Home / 128,277.86-177,008.11-70,909.45

Finding the Fourth Proportional to 128,277.86, 177,008.11 and 70,909.45

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Solution

The fourth proportional to 128,277.86, 177,008.11 and 70,909.45 is: 97,846.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,277.86 : 177,008.11 = 70,909.45 : x
  2. Step 2: Convert to fraction form
    128,277.86/177,008.11 = 70,909.45/x
  3. Step 3: Cross multiply
    128,277.86x = 177,008.11 × 70,909.45
  4. Step 4: Simplify right side
    128,277.86x = 12,551,547,105.85
  5. Step 5: Solve for x
    x = 12,551,547,105.85/128,277.86
  6. Step 6: Final answer
    x = 97,846.56

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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.