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Finding the Fourth Proportional to 157,750.76, 217,694.40 and 86,130.56

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Solution

The fourth proportional to 157,750.76, 217,694.40 and 86,130.56 is: 118,859.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,750.76 : 217,694.40 = 86,130.56 : x
  2. Step 2: Convert to fraction form
    157,750.76/217,694.40 = 86,130.56/x
  3. Step 3: Cross multiply
    157,750.76x = 217,694.40 × 86,130.56
  4. Step 4: Simplify right side
    157,750.76x = 18,750,140,580.86
  5. Step 5: Solve for x
    x = 18,750,140,580.86/157,750.76
  6. Step 6: Final answer
    x = 118,859.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.