Home / 180,961.29-249,715.35-100,387.20

Finding the Fourth Proportional to 180,961.29, 249,715.35 and 100,387.20

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Solution

The fourth proportional to 180,961.29, 249,715.35 and 100,387.20 is: 138,528.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,961.29 : 249,715.35 = 100,387.20 : x
  2. Step 2: Convert to fraction form
    180,961.29/249,715.35 = 100,387.20/x
  3. Step 3: Cross multiply
    180,961.29x = 249,715.35 × 100,387.20
  4. Step 4: Simplify right side
    180,961.29x = 25,068,224,783.52
  5. Step 5: Solve for x
    x = 25,068,224,783.52/180,961.29
  6. Step 6: Final answer
    x = 138,528.11

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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.