Home / 129,084,311.28-178,136,353.20-71,137,559.28

Finding the Fourth Proportional to 129,084,311.28, 178,136,353.20 and 71,137,559.28

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Solution

The fourth proportional to 129,084,311.28, 178,136,353.20 and 71,137,559.28 is: 98,169,833.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,084,311.28 : 178,136,353.20 = 71,137,559.28 : x
  2. Step 2: Convert to fraction form
    129,084,311.28/178,136,353.20 = 71,137,559.28/x
  3. Step 3: Cross multiply
    129,084,311.28x = 178,136,353.20 × 71,137,559.28
  4. Step 4: Simplify right side
    129,084,311.28x = 12,672,185,385,688,018
  5. Step 5: Solve for x
    x = 12,672,185,385,688,018/129,084,311.28
  6. Step 6: Final answer
    x = 98,169,833.81

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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.