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Finding the Fourth Proportional to 113,545.86, 156,693.36 and 65,826.90

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Solution

The fourth proportional to 113,545.86, 156,693.36 and 65,826.90 is: 90,841.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,545.86 : 156,693.36 = 65,826.90 : x
  2. Step 2: Convert to fraction form
    113,545.86/156,693.36 = 65,826.90/x
  3. Step 3: Cross multiply
    113,545.86x = 156,693.36 × 65,826.90
  4. Step 4: Simplify right side
    113,545.86x = 10,314,638,139.38
  5. Step 5: Solve for x
    x = 10,314,638,139.38/113,545.86
  6. Step 6: Final answer
    x = 90,841.16

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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.