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Finding the Fourth Proportional to 157,700.90, 236,478.45 and 68,908.70

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Solution

The fourth proportional to 157,700.90, 236,478.45 and 68,908.70 is: 103,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,700.90 : 236,478.45 = 68,908.70 : x
  2. Step 2: Convert to fraction form
    157,700.90/236,478.45 = 68,908.70/x
  3. Step 3: Cross multiply
    157,700.90x = 236,478.45 × 68,908.70
  4. Step 4: Simplify right side
    157,700.90x = 16,295,422,567.52
  5. Step 5: Solve for x
    x = 16,295,422,567.52/157,700.90
  6. Step 6: Final answer
    x = 103,331.20

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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.