Home / 142,988.87-197,318.02-78,456.50

Finding the Fourth Proportional to 142,988.87, 197,318.02 and 78,456.50

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Solution

The fourth proportional to 142,988.87, 197,318.02 and 78,456.50 is: 108,266.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,988.87 : 197,318.02 = 78,456.50 : x
  2. Step 2: Convert to fraction form
    142,988.87/197,318.02 = 78,456.50/x
  3. Step 3: Cross multiply
    142,988.87x = 197,318.02 × 78,456.50
  4. Step 4: Simplify right side
    142,988.87x = 15,480,880,423.37
  5. Step 5: Solve for x
    x = 15,480,880,423.37/142,988.87
  6. Step 6: Final answer
    x = 108,266.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.