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Finding the Fourth Proportional to 113,751.45, 156,978.62 and 62,766.40

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Solution

The fourth proportional to 113,751.45, 156,978.62 and 62,766.40 is: 86,618.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,751.45 : 156,978.62 = 62,766.40 : x
  2. Step 2: Convert to fraction form
    113,751.45/156,978.62 = 62,766.40/x
  3. Step 3: Cross multiply
    113,751.45x = 156,978.62 × 62,766.40
  4. Step 4: Simplify right side
    113,751.45x = 9,852,982,854.37
  5. Step 5: Solve for x
    x = 9,852,982,854.37/113,751.45
  6. Step 6: Final answer
    x = 86,618.53

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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.