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Finding the Fourth Proportional to 65,818.50, 90,844.14 and 45,429.18

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Solution

The fourth proportional to 65,818.50, 90,844.14 and 45,429.18 is: 62,702.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,818.50 : 90,844.14 = 45,429.18 : x
  2. Step 2: Convert to fraction form
    65,818.50/90,844.14 = 45,429.18/x
  3. Step 3: Cross multiply
    65,818.50x = 90,844.14 × 45,429.18
  4. Step 4: Simplify right side
    65,818.50x = 4,126,974,788.01
  5. Step 5: Solve for x
    x = 4,126,974,788.01/65,818.50
  6. Step 6: Final answer
    x = 62,702.35

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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.