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Finding the Fourth Proportional to 157,655.66, 217,569.42 and 86,040.28

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Solution

The fourth proportional to 157,655.66, 217,569.42 and 86,040.28 is: 118,738.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,655.66 : 217,569.42 = 86,040.28 : x
  2. Step 2: Convert to fraction form
    157,655.66/217,569.42 = 86,040.28/x
  3. Step 3: Cross multiply
    157,655.66x = 217,569.42 × 86,040.28
  4. Step 4: Simplify right side
    157,655.66x = 18,719,733,816.24
  5. Step 5: Solve for x
    x = 18,719,733,816.24/157,655.66
  6. Step 6: Final answer
    x = 118,738.10

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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.