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Finding the Fourth Proportional to 157,012.18, 216,674.72 and 85,390.66

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Solution

The fourth proportional to 157,012.18, 216,674.72 and 85,390.66 is: 117,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,012.18 : 216,674.72 = 85,390.66 : x
  2. Step 2: Convert to fraction form
    157,012.18/216,674.72 = 85,390.66/x
  3. Step 3: Cross multiply
    157,012.18x = 216,674.72 × 85,390.66
  4. Step 4: Simplify right side
    157,012.18x = 18,501,996,919.16
  5. Step 5: Solve for x
    x = 18,501,996,919.16/157,012.18
  6. Step 6: Final answer
    x = 117,837.97

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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.