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Finding the Fourth Proportional to 210,876.60, 316,314.90 and 86,188.44

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Solution

The fourth proportional to 210,876.60, 316,314.90 and 86,188.44 is: 129,282.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,876.60 : 316,314.90 = 86,188.44 : x
  2. Step 2: Convert to fraction form
    210,876.60/316,314.90 = 86,188.44/x
  3. Step 3: Cross multiply
    210,876.60x = 316,314.90 × 86,188.44
  4. Step 4: Simplify right side
    210,876.60x = 27,262,687,779.76
  5. Step 5: Solve for x
    x = 27,262,687,779.76/210,876.60
  6. Step 6: Final answer
    x = 129,282.66

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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.