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Finding the Fourth Proportional to 157,643, 217,552.56 and 86,026.96

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Solution

The fourth proportional to 157,643, 217,552.56 and 86,026.96 is: 118,720.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,643 : 217,552.56 = 86,026.96 : x
  2. Step 2: Convert to fraction form
    157,643/217,552.56 = 86,026.96/x
  3. Step 3: Cross multiply
    157,643x = 217,552.56 × 86,026.96
  4. Step 4: Simplify right side
    157,643x = 18,715,385,377.02
  5. Step 5: Solve for x
    x = 18,715,385,377.02/157,643
  6. Step 6: Final answer
    x = 118,720.05

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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.