Home / 80,875.40-121,313.10-77,246.60

Finding the Fourth Proportional to 80,875.40, 121,313.10 and 77,246.60

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Solution

The fourth proportional to 80,875.40, 121,313.10 and 77,246.60 is: 115,869.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,875.40 : 121,313.10 = 77,246.60 : x
  2. Step 2: Convert to fraction form
    80,875.40/121,313.10 = 77,246.60/x
  3. Step 3: Cross multiply
    80,875.40x = 121,313.10 × 77,246.60
  4. Step 4: Simplify right side
    80,875.40x = 9,371,024,510.46
  5. Step 5: Solve for x
    x = 9,371,024,510.46/80,875.40
  6. Step 6: Final answer
    x = 115,869.90

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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.