Home / 130,760.52-180,244.80-85,415.82

Finding the Fourth Proportional to 130,760.52, 180,244.80 and 85,415.82

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Solution

The fourth proportional to 130,760.52, 180,244.80 and 85,415.82 is: 117,740.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,760.52 : 180,244.80 = 85,415.82 : x
  2. Step 2: Convert to fraction form
    130,760.52/180,244.80 = 85,415.82/x
  3. Step 3: Cross multiply
    130,760.52x = 180,244.80 × 85,415.82
  4. Step 4: Simplify right side
    130,760.52x = 15,395,757,392.74
  5. Step 5: Solve for x
    x = 15,395,757,392.74/130,760.52
  6. Step 6: Final answer
    x = 117,740.11

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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.