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Finding the Fourth Proportional to 128,390.69, 177,182.91 and 70,250.92

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Solution

The fourth proportional to 128,390.69, 177,182.91 and 70,250.92 is: 96,948.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,390.69 : 177,182.91 = 70,250.92 : x
  2. Step 2: Convert to fraction form
    128,390.69/177,182.91 = 70,250.92/x
  3. Step 3: Cross multiply
    128,390.69x = 177,182.91 × 70,250.92
  4. Step 4: Simplify right side
    128,390.69x = 12,447,261,992.82
  5. Step 5: Solve for x
    x = 12,447,261,992.82/128,390.69
  6. Step 6: Final answer
    x = 96,948.32

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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.