Home / 129,587.43-178,808.98-72,214.18

Finding the Fourth Proportional to 129,587.43, 178,808.98 and 72,214.18

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Solution

The fourth proportional to 129,587.43, 178,808.98 and 72,214.18 is: 99,643.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,587.43 : 178,808.98 = 72,214.18 : x
  2. Step 2: Convert to fraction form
    129,587.43/178,808.98 = 72,214.18/x
  3. Step 3: Cross multiply
    129,587.43x = 178,808.98 × 72,214.18
  4. Step 4: Simplify right side
    129,587.43x = 12,912,543,423.53
  5. Step 5: Solve for x
    x = 12,912,543,423.53/129,587.43
  6. Step 6: Final answer
    x = 99,643.48

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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.