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Finding the Fourth Proportional to 82,812.10, 124,218.15 and 75,424.90

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Solution

The fourth proportional to 82,812.10, 124,218.15 and 75,424.90 is: 113,137.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,812.10 : 124,218.15 = 75,424.90 : x
  2. Step 2: Convert to fraction form
    82,812.10/124,218.15 = 75,424.90/x
  3. Step 3: Cross multiply
    82,812.10x = 124,218.15 × 75,424.90
  4. Step 4: Simplify right side
    82,812.10x = 9,369,141,541.94
  5. Step 5: Solve for x
    x = 9,369,141,541.94/82,812.10
  6. Step 6: Final answer
    x = 113,137.35

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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.