Home / 81,014.10-121,411.80-54,284.10

Finding the Fourth Proportional to 81,014.10, 121,411.80 and 54,284.10

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Solution

The fourth proportional to 81,014.10, 121,411.80 and 54,284.10 is: 81,352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.10 : 121,411.80 = 54,284.10 : x
  2. Step 2: Convert to fraction form
    81,014.10/121,411.80 = 54,284.10/x
  3. Step 3: Cross multiply
    81,014.10x = 121,411.80 × 54,284.10
  4. Step 4: Simplify right side
    81,014.10x = 6,590,730,292.38
  5. Step 5: Solve for x
    x = 6,590,730,292.38/81,014.10
  6. Step 6: Final answer
    x = 81,352.88

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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.