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Finding the Fourth Proportional to 180,570.66, 249,189.12 and 99,999.42

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Solution

The fourth proportional to 180,570.66, 249,189.12 and 99,999.42 is: 138,000.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,570.66 : 249,189.12 = 99,999.42 : x
  2. Step 2: Convert to fraction form
    180,570.66/249,189.12 = 99,999.42/x
  3. Step 3: Cross multiply
    180,570.66x = 249,189.12 × 99,999.42
  4. Step 4: Simplify right side
    180,570.66x = 24,918,767,470.31
  5. Step 5: Solve for x
    x = 24,918,767,470.31/180,570.66
  6. Step 6: Final answer
    x = 138,000.09

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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.