Home / 99,780.20-149,670.10-40,602.68

Finding the Fourth Proportional to 99,780.20, 149,670.10 and 40,602.68

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Solution

The fourth proportional to 99,780.20, 149,670.10 and 40,602.68 is: 60,903.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,780.20 : 149,670.10 = 40,602.68 : x
  2. Step 2: Convert to fraction form
    99,780.20/149,670.10 = 40,602.68/x
  3. Step 3: Cross multiply
    99,780.20x = 149,670.10 × 40,602.68
  4. Step 4: Simplify right side
    99,780.20x = 6,077,007,175.87
  5. Step 5: Solve for x
    x = 6,077,007,175.87/99,780.20
  6. Step 6: Final answer
    x = 60,903.94

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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.