Home / 129,812.90-179,143.17-72,457.70

Finding the Fourth Proportional to 129,812.90, 179,143.17 and 72,457.70

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Solution

The fourth proportional to 129,812.90, 179,143.17 and 72,457.70 is: 99,992.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,812.90 : 179,143.17 = 72,457.70 : x
  2. Step 2: Convert to fraction form
    129,812.90/179,143.17 = 72,457.70/x
  3. Step 3: Cross multiply
    129,812.90x = 179,143.17 × 72,457.70
  4. Step 4: Simplify right side
    129,812.90x = 12,980,302,068.91
  5. Step 5: Solve for x
    x = 12,980,302,068.91/129,812.90
  6. Step 6: Final answer
    x = 99,992.39

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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.