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Finding the Fourth Proportional to 52,617, 78,939.18 and 15,681

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Solution

The fourth proportional to 52,617, 78,939.18 and 15,681 is: 23,525.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,617 : 78,939.18 = 15,681 : x
  2. Step 2: Convert to fraction form
    52,617/78,939.18 = 15,681/x
  3. Step 3: Cross multiply
    52,617x = 78,939.18 × 15,681
  4. Step 4: Simplify right side
    52,617x = 1,237,845,281.58
  5. Step 5: Solve for x
    x = 1,237,845,281.58/52,617
  6. Step 6: Final answer
    x = 23,525.58

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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.