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Finding the Fourth Proportional to 157,297.80, 235,485.90 and 138,865.80

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Solution

The fourth proportional to 157,297.80, 235,485.90 and 138,865.80 is: 207,891.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,297.80 : 235,485.90 = 138,865.80 : x
  2. Step 2: Convert to fraction form
    157,297.80/235,485.90 = 138,865.80/x
  3. Step 3: Cross multiply
    157,297.80x = 235,485.90 × 138,865.80
  4. Step 4: Simplify right side
    157,297.80x = 32,700,937,892.22
  5. Step 5: Solve for x
    x = 32,700,937,892.22/157,297.80
  6. Step 6: Final answer
    x = 207,891.90

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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.