Home / 156,630.40-234,945.60-90,275.20

Finding the Fourth Proportional to 156,630.40, 234,945.60 and 90,275.20

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Solution

The fourth proportional to 156,630.40, 234,945.60 and 90,275.20 is: 135,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,630.40 : 234,945.60 = 90,275.20 : x
  2. Step 2: Convert to fraction form
    156,630.40/234,945.60 = 90,275.20/x
  3. Step 3: Cross multiply
    156,630.40x = 234,945.60 × 90,275.20
  4. Step 4: Simplify right side
    156,630.40x = 21,209,761,029.12
  5. Step 5: Solve for x
    x = 21,209,761,029.12/156,630.40
  6. Step 6: Final answer
    x = 135,412.80

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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.