Home / 142,340.20-213,510.30-89,981.80

Finding the Fourth Proportional to 142,340.20, 213,510.30 and 89,981.80

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Solution

The fourth proportional to 142,340.20, 213,510.30 and 89,981.80 is: 134,972.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,340.20 : 213,510.30 = 89,981.80 : x
  2. Step 2: Convert to fraction form
    142,340.20/213,510.30 = 89,981.80/x
  3. Step 3: Cross multiply
    142,340.20x = 213,510.30 × 89,981.80
  4. Step 4: Simplify right side
    142,340.20x = 19,212,041,112.54
  5. Step 5: Solve for x
    x = 19,212,041,112.54/142,340.20
  6. Step 6: Final answer
    x = 134,972.70

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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.