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Finding the Fourth Proportional to 157,702.28, 217,596.66 and 90,621.32

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Solution

The fourth proportional to 157,702.28, 217,596.66 and 90,621.32 is: 125,038.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,702.28 : 217,596.66 = 90,621.32 : x
  2. Step 2: Convert to fraction form
    157,702.28/217,596.66 = 90,621.32/x
  3. Step 3: Cross multiply
    157,702.28x = 217,596.66 × 90,621.32
  4. Step 4: Simplify right side
    157,702.28x = 19,718,896,556.79
  5. Step 5: Solve for x
    x = 19,718,896,556.79/157,702.28
  6. Step 6: Final answer
    x = 125,038.75

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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.