Home / 145,043.12-217,362.20-78,339.52

Finding the Fourth Proportional to 145,043.12, 217,362.20 and 78,339.52

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Solution

The fourth proportional to 145,043.12, 217,362.20 and 78,339.52 is: 117,399.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,043.12 : 217,362.20 = 78,339.52 : x
  2. Step 2: Convert to fraction form
    145,043.12/217,362.20 = 78,339.52/x
  3. Step 3: Cross multiply
    145,043.12x = 217,362.20 × 78,339.52
  4. Step 4: Simplify right side
    145,043.12x = 17,028,050,414.14
  5. Step 5: Solve for x
    x = 17,028,050,414.14/145,043.12
  6. Step 6: Final answer
    x = 117,399.92

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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.