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Finding the Fourth Proportional to 113,543.11, 156,681.93 and 65,787.94

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Solution

The fourth proportional to 113,543.11, 156,681.93 and 65,787.94 is: 90,782.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,543.11 : 156,681.93 = 65,787.94 : x
  2. Step 2: Convert to fraction form
    113,543.11/156,681.93 = 65,787.94/x
  3. Step 3: Cross multiply
    113,543.11x = 156,681.93 × 65,787.94
  4. Step 4: Simplify right side
    113,543.11x = 10,307,781,409.92
  5. Step 5: Solve for x
    x = 10,307,781,409.92/113,543.11
  6. Step 6: Final answer
    x = 90,782.98

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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.