Home / 129,315.40-178,428.51-75,590.02

Finding the Fourth Proportional to 129,315.40, 178,428.51 and 75,590.02

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Solution

The fourth proportional to 129,315.40, 178,428.51 and 75,590.02 is: 104,298.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,315.40 : 178,428.51 = 75,590.02 : x
  2. Step 2: Convert to fraction form
    129,315.40/178,428.51 = 75,590.02/x
  3. Step 3: Cross multiply
    129,315.40x = 178,428.51 × 75,590.02
  4. Step 4: Simplify right side
    129,315.40x = 13,487,414,639.47
  5. Step 5: Solve for x
    x = 13,487,414,639.47/129,315.40
  6. Step 6: Final answer
    x = 104,298.60

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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.