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Finding the Fourth Proportional to 157,486.80, 236,105.40 and 78,560.40

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Solution

The fourth proportional to 157,486.80, 236,105.40 and 78,560.40 is: 117,778.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,486.80 : 236,105.40 = 78,560.40 : x
  2. Step 2: Convert to fraction form
    157,486.80/236,105.40 = 78,560.40/x
  3. Step 3: Cross multiply
    157,486.80x = 236,105.40 × 78,560.40
  4. Step 4: Simplify right side
    157,486.80x = 18,548,534,666.16
  5. Step 5: Solve for x
    x = 18,548,534,666.16/157,486.80
  6. Step 6: Final answer
    x = 117,778.35

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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.