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Finding the Fourth Proportional to 112,712.50, 155,548.11 and 62,411.50

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Solution

The fourth proportional to 112,712.50, 155,548.11 and 62,411.50 is: 86,130.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,712.50 : 155,548.11 = 62,411.50 : x
  2. Step 2: Convert to fraction form
    112,712.50/155,548.11 = 62,411.50/x
  3. Step 3: Cross multiply
    112,712.50x = 155,548.11 × 62,411.50
  4. Step 4: Simplify right side
    112,712.50x = 9,707,990,867.27
  5. Step 5: Solve for x
    x = 9,707,990,867.27/112,712.50
  6. Step 6: Final answer
    x = 86,130.56

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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.