Home / 99,756.30-137,666.07-56,742.78

Finding the Fourth Proportional to 99,756.30, 137,666.07 and 56,742.78

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Solution

The fourth proportional to 99,756.30, 137,666.07 and 56,742.78 is: 78,306.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,756.30 : 137,666.07 = 56,742.78 : x
  2. Step 2: Convert to fraction form
    99,756.30/137,666.07 = 56,742.78/x
  3. Step 3: Cross multiply
    99,756.30x = 137,666.07 × 56,742.78
  4. Step 4: Simplify right side
    99,756.30x = 7,811,555,523.47
  5. Step 5: Solve for x
    x = 7,811,555,523.47/99,756.30
  6. Step 6: Final answer
    x = 78,306.39

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1.5x scale

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.