Home / 129,755,790.42-179,043,729.20-78,808,116.66

Finding the Fourth Proportional to 129,755,790.42, 179,043,729.20 and 78,808,116.66

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Solution

The fourth proportional to 129,755,790.42, 179,043,729.20 and 78,808,116.66 is: 108,743,502.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,755,790.42 : 179,043,729.20 = 78,808,116.66 : x
  2. Step 2: Convert to fraction form
    129,755,790.42/179,043,729.20 = 78,808,116.66/x
  3. Step 3: Cross multiply
    129,755,790.42x = 179,043,729.20 × 78,808,116.66
  4. Step 4: Simplify right side
    129,755,790.42x = 14,110,099,098,035,046
  5. Step 5: Solve for x
    x = 14,110,099,098,035,046/129,755,790.42
  6. Step 6: Final answer
    x = 108,743,502.33

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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.