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Finding the Fourth Proportional to 210,449.19, 315,714.96 and 77,330.55

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Solution

The fourth proportional to 210,449.19, 315,714.96 and 77,330.55 is: 116,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,449.19 : 315,714.96 = 77,330.55 : x
  2. Step 2: Convert to fraction form
    210,449.19/315,714.96 = 77,330.55/x
  3. Step 3: Cross multiply
    210,449.19x = 315,714.96 × 77,330.55
  4. Step 4: Simplify right side
    210,449.19x = 24,414,411,500.03
  5. Step 5: Solve for x
    x = 24,414,411,500.03/210,449.19
  6. Step 6: Final answer
    x = 116,010.95

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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.