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Finding the Fourth Proportional to 156,987.30, 235,480.95 and 143,209.20

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Solution

The fourth proportional to 156,987.30, 235,480.95 and 143,209.20 is: 214,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.30 : 235,480.95 = 143,209.20 : x
  2. Step 2: Convert to fraction form
    156,987.30/235,480.95 = 143,209.20/x
  3. Step 3: Cross multiply
    156,987.30x = 235,480.95 × 143,209.20
  4. Step 4: Simplify right side
    156,987.30x = 33,723,038,464.74
  5. Step 5: Solve for x
    x = 33,723,038,464.74/156,987.30
  6. Step 6: Final answer
    x = 214,813.80

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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.