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Finding the Fourth Proportional to 210,411.20, 315,616.80 and 60,638.15

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Solution

The fourth proportional to 210,411.20, 315,616.80 and 60,638.15 is: 90,957.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,411.20 : 315,616.80 = 60,638.15 : x
  2. Step 2: Convert to fraction form
    210,411.20/315,616.80 = 60,638.15/x
  3. Step 3: Cross multiply
    210,411.20x = 315,616.80 × 60,638.15
  4. Step 4: Simplify right side
    210,411.20x = 19,138,418,860.92
  5. Step 5: Solve for x
    x = 19,138,418,860.92/210,411.20
  6. Step 6: Final answer
    x = 90,957.23

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1.5x scale

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.