Home / 127,870.20-191,586.60-81,068.40

Finding the Fourth Proportional to 127,870.20, 191,586.60 and 81,068.40

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Solution

The fourth proportional to 127,870.20, 191,586.60 and 81,068.40 is: 121,463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,870.20 : 191,586.60 = 81,068.40 : x
  2. Step 2: Convert to fraction form
    127,870.20/191,586.60 = 81,068.40/x
  3. Step 3: Cross multiply
    127,870.20x = 191,586.60 × 81,068.40
  4. Step 4: Simplify right side
    127,870.20x = 15,531,619,123.44
  5. Step 5: Solve for x
    x = 15,531,619,123.44/127,870.20
  6. Step 6: Final answer
    x = 121,463.95

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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.