Home / 101,865.20-152,970.12-66,386.79

Finding the Fourth Proportional to 101,865.20, 152,970.12 and 66,386.79

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Solution

The fourth proportional to 101,865.20, 152,970.12 and 66,386.79 is: 99,692.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,865.20 : 152,970.12 = 66,386.79 : x
  2. Step 2: Convert to fraction form
    101,865.20/152,970.12 = 66,386.79/x
  3. Step 3: Cross multiply
    101,865.20x = 152,970.12 × 66,386.79
  4. Step 4: Simplify right side
    101,865.20x = 10,155,195,232.71
  5. Step 5: Solve for x
    x = 10,155,195,232.71/101,865.20
  6. Step 6: Final answer
    x = 99,692.49

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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.