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Finding the Fourth Proportional to 66,487.86, 99,342.39 and 64,162.35

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Solution

The fourth proportional to 66,487.86, 99,342.39 and 64,162.35 is: 95,867.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,487.86 : 99,342.39 = 64,162.35 : x
  2. Step 2: Convert to fraction form
    66,487.86/99,342.39 = 64,162.35/x
  3. Step 3: Cross multiply
    66,487.86x = 99,342.39 × 64,162.35
  4. Step 4: Simplify right side
    66,487.86x = 6,374,041,197.02
  5. Step 5: Solve for x
    x = 6,374,041,197.02/66,487.86
  6. Step 6: Final answer
    x = 95,867.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.