Home / 130,931.20-180,754.10-88,135.70

Finding the Fourth Proportional to 130,931.20, 180,754.10 and 88,135.70

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Solution

The fourth proportional to 130,931.20, 180,754.10 and 88,135.70 is: 121,673.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,931.20 : 180,754.10 = 88,135.70 : x
  2. Step 2: Convert to fraction form
    130,931.20/180,754.10 = 88,135.70/x
  3. Step 3: Cross multiply
    130,931.20x = 180,754.10 × 88,135.70
  4. Step 4: Simplify right side
    130,931.20x = 15,930,889,131.37
  5. Step 5: Solve for x
    x = 15,930,889,131.37/130,931.20
  6. Step 6: Final answer
    x = 121,673.74

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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.