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Finding the Fourth Proportional to 78,862.80, 118,099.80 and 52,424.40

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Solution

The fourth proportional to 78,862.80, 118,099.80 and 52,424.40 is: 78,507.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,862.80 : 118,099.80 = 52,424.40 : x
  2. Step 2: Convert to fraction form
    78,862.80/118,099.80 = 52,424.40/x
  3. Step 3: Cross multiply
    78,862.80x = 118,099.80 × 52,424.40
  4. Step 4: Simplify right side
    78,862.80x = 6,191,311,155.12
  5. Step 5: Solve for x
    x = 6,191,311,155.12/78,862.80
  6. Step 6: Final answer
    x = 78,507.37

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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.