Home / 129,407.87-178,586.82-70,475.30

Finding the Fourth Proportional to 129,407.87, 178,586.82 and 70,475.30

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Solution

The fourth proportional to 129,407.87, 178,586.82 and 70,475.30 is: 97,258.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,407.87 : 178,586.82 = 70,475.30 : x
  2. Step 2: Convert to fraction form
    129,407.87/178,586.82 = 70,475.30/x
  3. Step 3: Cross multiply
    129,407.87x = 178,586.82 × 70,475.30
  4. Step 4: Simplify right side
    129,407.87x = 12,585,958,822.61
  5. Step 5: Solve for x
    x = 12,585,958,822.61/129,407.87
  6. Step 6: Final answer
    x = 97,258.07

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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.