Home / 128,555,573.99-177,417,633.15-72,810,910.67

Finding the Fourth Proportional to 128,555,573.99, 177,417,633.15 and 72,810,910.67

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Solution

The fourth proportional to 128,555,573.99, 177,417,633.15 and 72,810,910.67 is: 100,485,253.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,555,573.99 : 177,417,633.15 = 72,810,910.67 : x
  2. Step 2: Convert to fraction form
    128,555,573.99/177,417,633.15 = 72,810,910.67/x
  3. Step 3: Cross multiply
    128,555,573.99x = 177,417,633.15 × 72,810,910.67
  4. Step 4: Simplify right side
    128,555,573.99x = 12,917,939,437,680,394
  5. Step 5: Solve for x
    x = 12,917,939,437,680,394/128,555,573.99
  6. Step 6: Final answer
    x = 100,485,253.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.