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Finding the Fourth Proportional to 316,061.16, 474,340.83 and 138,690.60

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Solution

The fourth proportional to 316,061.16, 474,340.83 and 138,690.60 is: 208,145.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,061.16 : 474,340.83 = 138,690.60 : x
  2. Step 2: Convert to fraction form
    316,061.16/474,340.83 = 138,690.60/x
  3. Step 3: Cross multiply
    316,061.16x = 474,340.83 × 138,690.60
  4. Step 4: Simplify right side
    316,061.16x = 65,786,614,317.20
  5. Step 5: Solve for x
    x = 65,786,614,317.20/316,061.16
  6. Step 6: Final answer
    x = 208,145.20

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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.