Home / 129,509.24-178,720.04-72,148.47

Finding the Fourth Proportional to 129,509.24, 178,720.04 and 72,148.47

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Solution

The fourth proportional to 129,509.24, 178,720.04 and 72,148.47 is: 99,563.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,509.24 : 178,720.04 = 72,148.47 : x
  2. Step 2: Convert to fraction form
    129,509.24/178,720.04 = 72,148.47/x
  3. Step 3: Cross multiply
    129,509.24x = 178,720.04 × 72,148.47
  4. Step 4: Simplify right side
    129,509.24x = 12,894,377,083.60
  5. Step 5: Solve for x
    x = 12,894,377,083.60/129,509.24
  6. Step 6: Final answer
    x = 99,563.38

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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.