Home / 130,634.91-180,314.51-85,319.76

Finding the Fourth Proportional to 130,634.91, 180,314.51 and 85,319.76

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Solution

The fourth proportional to 130,634.91, 180,314.51 and 85,319.76 is: 117,766.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,634.91 : 180,314.51 = 85,319.76 : x
  2. Step 2: Convert to fraction form
    130,634.91/180,314.51 = 85,319.76/x
  3. Step 3: Cross multiply
    130,634.91x = 180,314.51 × 85,319.76
  4. Step 4: Simplify right side
    130,634.91x = 15,384,390,967.30
  5. Step 5: Solve for x
    x = 15,384,390,967.30/130,634.91
  6. Step 6: Final answer
    x = 117,766.31

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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.