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Finding the Fourth Proportional to 143,792.10, 215,688.15 and 54,999.90

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Solution

The fourth proportional to 143,792.10, 215,688.15 and 54,999.90 is: 82,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,792.10 : 215,688.15 = 54,999.90 : x
  2. Step 2: Convert to fraction form
    143,792.10/215,688.15 = 54,999.90/x
  3. Step 3: Cross multiply
    143,792.10x = 215,688.15 × 54,999.90
  4. Step 4: Simplify right side
    143,792.10x = 11,862,826,681.19
  5. Step 5: Solve for x
    x = 11,862,826,681.19/143,792.10
  6. Step 6: Final answer
    x = 82,499.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.