Home / 81,014.40-121,521.60-79,702.20

Finding the Fourth Proportional to 81,014.40, 121,521.60 and 79,702.20

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Solution

The fourth proportional to 81,014.40, 121,521.60 and 79,702.20 is: 119,553.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.40 : 121,521.60 = 79,702.20 : x
  2. Step 2: Convert to fraction form
    81,014.40/121,521.60 = 79,702.20/x
  3. Step 3: Cross multiply
    81,014.40x = 121,521.60 × 79,702.20
  4. Step 4: Simplify right side
    81,014.40x = 9,685,538,867.52
  5. Step 5: Solve for x
    x = 9,685,538,867.52/81,014.40
  6. Step 6: Final answer
    x = 119,553.30

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1.5x scale

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.