Home / 130,686.85-180,320.35-85,431.13

Finding the Fourth Proportional to 130,686.85, 180,320.35 and 85,431.13

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Solution

The fourth proportional to 130,686.85, 180,320.35 and 85,431.13 is: 117,876.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,686.85 : 180,320.35 = 85,431.13 : x
  2. Step 2: Convert to fraction form
    130,686.85/180,320.35 = 85,431.13/x
  3. Step 3: Cross multiply
    130,686.85x = 180,320.35 × 85,431.13
  4. Step 4: Simplify right side
    130,686.85x = 15,404,970,835.34
  5. Step 5: Solve for x
    x = 15,404,970,835.34/130,686.85
  6. Step 6: Final answer
    x = 117,876.98

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1.5x scale

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.