Home / 129,314.48-178,419.11-75,612.69

Finding the Fourth Proportional to 129,314.48, 178,419.11 and 75,612.69

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Solution

The fourth proportional to 129,314.48, 178,419.11 and 75,612.69 is: 104,325.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,314.48 : 178,419.11 = 75,612.69 : x
  2. Step 2: Convert to fraction form
    129,314.48/178,419.11 = 75,612.69/x
  3. Step 3: Cross multiply
    129,314.48x = 178,419.11 × 75,612.69
  4. Step 4: Simplify right side
    129,314.48x = 13,490,748,476.44
  5. Step 5: Solve for x
    x = 13,490,748,476.44/129,314.48
  6. Step 6: Final answer
    x = 104,325.12

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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.