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Finding the Fourth Proportional to 316,430.80, 474,675.04 and 103,143.96

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Solution

The fourth proportional to 316,430.80, 474,675.04 and 103,143.96 is: 154,725.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,430.80 : 474,675.04 = 103,143.96 : x
  2. Step 2: Convert to fraction form
    316,430.80/474,675.04 = 103,143.96/x
  3. Step 3: Cross multiply
    316,430.80x = 474,675.04 × 103,143.96
  4. Step 4: Simplify right side
    316,430.80x = 48,959,864,972.55
  5. Step 5: Solve for x
    x = 48,959,864,972.55/316,430.80
  6. Step 6: Final answer
    x = 154,725.35

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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.