Home / 87,890.04-121,254.80-64,974.89

Finding the Fourth Proportional to 87,890.04, 121,254.80 and 64,974.89

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Solution

The fourth proportional to 87,890.04, 121,254.80 and 64,974.89 is: 89,640.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,890.04 : 121,254.80 = 64,974.89 : x
  2. Step 2: Convert to fraction form
    87,890.04/121,254.80 = 64,974.89/x
  3. Step 3: Cross multiply
    87,890.04x = 121,254.80 × 64,974.89
  4. Step 4: Simplify right side
    87,890.04x = 7,878,517,270.23
  5. Step 5: Solve for x
    x = 7,878,517,270.23/87,890.04
  6. Step 6: Final answer
    x = 89,640.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.