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Finding the Fourth Proportional to 210,264.80, 315,397.20 and 99,672.80

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Solution

The fourth proportional to 210,264.80, 315,397.20 and 99,672.80 is: 149,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,264.80 : 315,397.20 = 99,672.80 : x
  2. Step 2: Convert to fraction form
    210,264.80/315,397.20 = 99,672.80/x
  3. Step 3: Cross multiply
    210,264.80x = 315,397.20 × 99,672.80
  4. Step 4: Simplify right side
    210,264.80x = 31,436,522,036.16
  5. Step 5: Solve for x
    x = 31,436,522,036.16/210,264.80
  6. Step 6: Final answer
    x = 149,509.20

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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.