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Finding the Fourth Proportional to 142,354.20, 213,531.30 and 72,370.20

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Solution

The fourth proportional to 142,354.20, 213,531.30 and 72,370.20 is: 108,555.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,354.20 : 213,531.30 = 72,370.20 : x
  2. Step 2: Convert to fraction form
    142,354.20/213,531.30 = 72,370.20/x
  3. Step 3: Cross multiply
    142,354.20x = 213,531.30 × 72,370.20
  4. Step 4: Simplify right side
    142,354.20x = 15,453,302,887.26
  5. Step 5: Solve for x
    x = 15,453,302,887.26/142,354.20
  6. Step 6: Final answer
    x = 108,555.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.