Home / 156,947.30-235,420.95-78,215.30

Finding the Fourth Proportional to 156,947.30, 235,420.95 and 78,215.30

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Solution

The fourth proportional to 156,947.30, 235,420.95 and 78,215.30 is: 117,322.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,947.30 : 235,420.95 = 78,215.30 : x
  2. Step 2: Convert to fraction form
    156,947.30/235,420.95 = 78,215.30/x
  3. Step 3: Cross multiply
    156,947.30x = 235,420.95 × 78,215.30
  4. Step 4: Simplify right side
    156,947.30x = 18,413,520,230.54
  5. Step 5: Solve for x
    x = 18,413,520,230.54/156,947.30
  6. Step 6: Final answer
    x = 117,322.95

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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.