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Finding the Fourth Proportional to 64,681.68, 89,259.84 and 36,387.40

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Solution

The fourth proportional to 64,681.68, 89,259.84 and 36,387.40 is: 50,214.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,681.68 : 89,259.84 = 36,387.40 : x
  2. Step 2: Convert to fraction form
    64,681.68/89,259.84 = 36,387.40/x
  3. Step 3: Cross multiply
    64,681.68x = 89,259.84 × 36,387.40
  4. Step 4: Simplify right side
    64,681.68x = 3,247,933,502.02
  5. Step 5: Solve for x
    x = 3,247,933,502.02/64,681.68
  6. Step 6: Final answer
    x = 50,214.12

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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.