Home / 129,673.86-178,943-72,319.06

Finding the Fourth Proportional to 129,673.86, 178,943 and 72,319.06

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Solution

The fourth proportional to 129,673.86, 178,943 and 72,319.06 is: 99,796.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,673.86 : 178,943 = 72,319.06 : x
  2. Step 2: Convert to fraction form
    129,673.86/178,943 = 72,319.06/x
  3. Step 3: Cross multiply
    129,673.86x = 178,943 × 72,319.06
  4. Step 4: Simplify right side
    129,673.86x = 12,940,989,553.58
  5. Step 5: Solve for x
    x = 12,940,989,553.58/129,673.86
  6. Step 6: Final answer
    x = 99,796.44

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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.