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Finding the Fourth Proportional to 157,119.75, 216,821.70 and 85,499.94

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Solution

The fourth proportional to 157,119.75, 216,821.70 and 85,499.94 is: 117,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,119.75 : 216,821.70 = 85,499.94 : x
  2. Step 2: Convert to fraction form
    157,119.75/216,821.70 = 85,499.94/x
  3. Step 3: Cross multiply
    157,119.75x = 216,821.70 × 85,499.94
  4. Step 4: Simplify right side
    157,119.75x = 18,538,242,340.70
  5. Step 5: Solve for x
    x = 18,538,242,340.70/157,119.75
  6. Step 6: Final answer
    x = 117,987.98

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1.5x scale

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.