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Finding the Fourth Proportional to 52,979.16, 79,459.16 and 21,387.90

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Solution

The fourth proportional to 52,979.16, 79,459.16 and 21,387.90 is: 32,077.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,979.16 : 79,459.16 = 21,387.90 : x
  2. Step 2: Convert to fraction form
    52,979.16/79,459.16 = 21,387.90/x
  3. Step 3: Cross multiply
    52,979.16x = 79,459.16 × 21,387.90
  4. Step 4: Simplify right side
    52,979.16x = 1,699,464,461.22
  5. Step 5: Solve for x
    x = 1,699,464,461.22/52,979.16
  6. Step 6: Final answer
    x = 32,077.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.