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Finding the Fourth Proportional to 64,702.70, 89,281.95 and 36,015.47

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Solution

The fourth proportional to 64,702.70, 89,281.95 and 36,015.47 is: 49,697.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,702.70 : 89,281.95 = 36,015.47 : x
  2. Step 2: Convert to fraction form
    64,702.70/89,281.95 = 36,015.47/x
  3. Step 3: Cross multiply
    64,702.70x = 89,281.95 × 36,015.47
  4. Step 4: Simplify right side
    64,702.70x = 3,215,531,145.11
  5. Step 5: Solve for x
    x = 3,215,531,145.11/64,702.70
  6. Step 6: Final answer
    x = 49,697.02

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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.