Home / 129,645.28-178,950.04-75,211.20

Finding the Fourth Proportional to 129,645.28, 178,950.04 and 75,211.20

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Solution

The fourth proportional to 129,645.28, 178,950.04 and 75,211.20 is: 103,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,645.28 : 178,950.04 = 75,211.20 : x
  2. Step 2: Convert to fraction form
    129,645.28/178,950.04 = 75,211.20/x
  3. Step 3: Cross multiply
    129,645.28x = 178,950.04 × 75,211.20
  4. Step 4: Simplify right side
    129,645.28x = 13,459,047,248.45
  5. Step 5: Solve for x
    x = 13,459,047,248.45/129,645.28
  6. Step 6: Final answer
    x = 103,814.40

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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.