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Finding the Fourth Proportional to 78,840.80, 118,066.80 and 52,402.40

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Solution

The fourth proportional to 78,840.80, 118,066.80 and 52,402.40 is: 78,474.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,840.80 : 118,066.80 = 52,402.40 : x
  2. Step 2: Convert to fraction form
    78,840.80/118,066.80 = 52,402.40/x
  3. Step 3: Cross multiply
    78,840.80x = 118,066.80 × 52,402.40
  4. Step 4: Simplify right side
    78,840.80x = 6,186,983,680.32
  5. Step 5: Solve for x
    x = 6,186,983,680.32/78,840.80
  6. Step 6: Final answer
    x = 78,474.39

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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.