Home / 130,487.58-180,159.57-100,218.78

Finding the Fourth Proportional to 130,487.58, 180,159.57 and 100,218.78

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Solution

The fourth proportional to 130,487.58, 180,159.57 and 100,218.78 is: 138,368.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,487.58 : 180,159.57 = 100,218.78 : x
  2. Step 2: Convert to fraction form
    130,487.58/180,159.57 = 100,218.78/x
  3. Step 3: Cross multiply
    130,487.58x = 180,159.57 × 100,218.78
  4. Step 4: Simplify right side
    130,487.58x = 18,055,372,310.72
  5. Step 5: Solve for x
    x = 18,055,372,310.72/130,487.58
  6. Step 6: Final answer
    x = 138,368.51

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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.