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Finding the Fourth Proportional to 113,712, 156,922.56 and 63,409.92

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Solution

The fourth proportional to 113,712, 156,922.56 and 63,409.92 is: 87,505.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,712 : 156,922.56 = 63,409.92 : x
  2. Step 2: Convert to fraction form
    113,712/156,922.56 = 63,409.92/x
  3. Step 3: Cross multiply
    113,712x = 156,922.56 × 63,409.92
  4. Step 4: Simplify right side
    113,712x = 9,950,446,975.80
  5. Step 5: Solve for x
    x = 9,950,446,975.80/113,712
  6. Step 6: Final answer
    x = 87,505.69

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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.