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Finding the Fourth Proportional to 157,231.98, 216,980.39 and 85,612.30

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Solution

The fourth proportional to 157,231.98, 216,980.39 and 85,612.30 is: 118,145.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,231.98 : 216,980.39 = 85,612.30 : x
  2. Step 2: Convert to fraction form
    157,231.98/216,980.39 = 85,612.30/x
  3. Step 3: Cross multiply
    157,231.98x = 216,980.39 × 85,612.30
  4. Step 4: Simplify right side
    157,231.98x = 18,576,189,914.38
  5. Step 5: Solve for x
    x = 18,576,189,914.38/157,231.98
  6. Step 6: Final answer
    x = 118,145.11

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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.