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Finding the Fourth Proportional to 157,503.40, 236,255.10 and 86,644.60

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Solution

The fourth proportional to 157,503.40, 236,255.10 and 86,644.60 is: 129,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,503.40 : 236,255.10 = 86,644.60 : x
  2. Step 2: Convert to fraction form
    157,503.40/236,255.10 = 86,644.60/x
  3. Step 3: Cross multiply
    157,503.40x = 236,255.10 × 86,644.60
  4. Step 4: Simplify right side
    157,503.40x = 20,470,228,637.46
  5. Step 5: Solve for x
    x = 20,470,228,637.46/157,503.40
  6. Step 6: Final answer
    x = 129,966.90

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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.