Home / 99,831.12-149,761.20-40,670.40

Finding the Fourth Proportional to 99,831.12, 149,761.20 and 40,670.40

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Solution

The fourth proportional to 99,831.12, 149,761.20 and 40,670.40 is: 61,011.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,831.12 : 149,761.20 = 40,670.40 : x
  2. Step 2: Convert to fraction form
    99,831.12/149,761.20 = 40,670.40/x
  3. Step 3: Cross multiply
    99,831.12x = 149,761.20 × 40,670.40
  4. Step 4: Simplify right side
    99,831.12x = 6,090,847,908.48
  5. Step 5: Solve for x
    x = 6,090,847,908.48/99,831.12
  6. Step 6: Final answer
    x = 61,011.52

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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.