Home / 156,945.30-235,417.95-78,213.30

Finding the Fourth Proportional to 156,945.30, 235,417.95 and 78,213.30

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Solution

The fourth proportional to 156,945.30, 235,417.95 and 78,213.30 is: 117,319.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,945.30 : 235,417.95 = 78,213.30 : x
  2. Step 2: Convert to fraction form
    156,945.30/235,417.95 = 78,213.30/x
  3. Step 3: Cross multiply
    156,945.30x = 235,417.95 × 78,213.30
  4. Step 4: Simplify right side
    156,945.30x = 18,412,814,748.74
  5. Step 5: Solve for x
    x = 18,412,814,748.74/156,945.30
  6. Step 6: Final answer
    x = 117,319.95

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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.