Home / 138,990.40-208,359.24-72,352.24

Finding the Fourth Proportional to 138,990.40, 208,359.24 and 72,352.24

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Solution

The fourth proportional to 138,990.40, 208,359.24 and 72,352.24 is: 108,462.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,990.40 : 208,359.24 = 72,352.24 : x
  2. Step 2: Convert to fraction form
    138,990.40/208,359.24 = 72,352.24/x
  3. Step 3: Cross multiply
    138,990.40x = 208,359.24 × 72,352.24
  4. Step 4: Simplify right side
    138,990.40x = 15,075,257,738.70
  5. Step 5: Solve for x
    x = 15,075,257,738.70/138,990.40
  6. Step 6: Final answer
    x = 108,462.58

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1.5x scale

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.