Home / 129,351.15-178,504.31-72,762.53

Finding the Fourth Proportional to 129,351.15, 178,504.31 and 72,762.53

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Solution

The fourth proportional to 129,351.15, 178,504.31 and 72,762.53 is: 100,412.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,351.15 : 178,504.31 = 72,762.53 : x
  2. Step 2: Convert to fraction form
    129,351.15/178,504.31 = 72,762.53/x
  3. Step 3: Cross multiply
    129,351.15x = 178,504.31 × 72,762.53
  4. Step 4: Simplify right side
    129,351.15x = 12,988,424,500.89
  5. Step 5: Solve for x
    x = 12,988,424,500.89/129,351.15
  6. Step 6: Final answer
    x = 100,412.13

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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.