Home / 138,869.20-208,303.80-72,439.08

Finding the Fourth Proportional to 138,869.20, 208,303.80 and 72,439.08

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Solution

The fourth proportional to 138,869.20, 208,303.80 and 72,439.08 is: 108,658.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,869.20 : 208,303.80 = 72,439.08 : x
  2. Step 2: Convert to fraction form
    138,869.20/208,303.80 = 72,439.08/x
  3. Step 3: Cross multiply
    138,869.20x = 208,303.80 × 72,439.08
  4. Step 4: Simplify right side
    138,869.20x = 15,089,335,632.50
  5. Step 5: Solve for x
    x = 15,089,335,632.50/138,869.20
  6. Step 6: Final answer
    x = 108,658.62

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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.