Home / 81,007.20-121,510.80-64,276.65

Finding the Fourth Proportional to 81,007.20, 121,510.80 and 64,276.65

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Solution

The fourth proportional to 81,007.20, 121,510.80 and 64,276.65 is: 96,414.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,007.20 : 121,510.80 = 64,276.65 : x
  2. Step 2: Convert to fraction form
    81,007.20/121,510.80 = 64,276.65/x
  3. Step 3: Cross multiply
    81,007.20x = 121,510.80 × 64,276.65
  4. Step 4: Simplify right side
    81,007.20x = 7,810,307,162.82
  5. Step 5: Solve for x
    x = 7,810,307,162.82/81,007.20
  6. Step 6: Final answer
    x = 96,414.98

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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.