Home / 99,013.20-148,519.80-72,769.20

Finding the Fourth Proportional to 99,013.20, 148,519.80 and 72,769.20

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Solution

The fourth proportional to 99,013.20, 148,519.80 and 72,769.20 is: 109,153.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,013.20 : 148,519.80 = 72,769.20 : x
  2. Step 2: Convert to fraction form
    99,013.20/148,519.80 = 72,769.20/x
  3. Step 3: Cross multiply
    99,013.20x = 148,519.80 × 72,769.20
  4. Step 4: Simplify right side
    99,013.20x = 10,807,667,030.16
  5. Step 5: Solve for x
    x = 10,807,667,030.16/99,013.20
  6. Step 6: Final answer
    x = 109,153.80

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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.