Home / 78,186.64-117,250.68-31,423.76

Finding the Fourth Proportional to 78,186.64, 117,250.68 and 31,423.76

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Solution

The fourth proportional to 78,186.64, 117,250.68 and 31,423.76 is: 47,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,186.64 : 117,250.68 = 31,423.76 : x
  2. Step 2: Convert to fraction form
    78,186.64/117,250.68 = 31,423.76/x
  3. Step 3: Cross multiply
    78,186.64x = 117,250.68 × 31,423.76
  4. Step 4: Simplify right side
    78,186.64x = 3,684,457,228.16
  5. Step 5: Solve for x
    x = 3,684,457,228.16/78,186.64
  6. Step 6: Final answer
    x = 47,123.87

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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.