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Finding the Fourth Proportional to 157,648.60, 236,618.70 and 78,819.40

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Solution

The fourth proportional to 157,648.60, 236,618.70 and 78,819.40 is: 118,302.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,648.60 : 236,618.70 = 78,819.40 : x
  2. Step 2: Convert to fraction form
    157,648.60/236,618.70 = 78,819.40/x
  3. Step 3: Cross multiply
    157,648.60x = 236,618.70 × 78,819.40
  4. Step 4: Simplify right side
    157,648.60x = 18,650,143,962.78
  5. Step 5: Solve for x
    x = 18,650,143,962.78/157,648.60
  6. Step 6: Final answer
    x = 118,302.00

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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.