Home / 81,387.19-122,117.24-64,693.09

Finding the Fourth Proportional to 81,387.19, 122,117.24 and 64,693.09

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Solution

The fourth proportional to 81,387.19, 122,117.24 and 64,693.09 is: 97,068.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,387.19 : 122,117.24 = 64,693.09 : x
  2. Step 2: Convert to fraction form
    81,387.19/122,117.24 = 64,693.09/x
  3. Step 3: Cross multiply
    81,387.19x = 122,117.24 × 64,693.09
  4. Step 4: Simplify right side
    81,387.19x = 7,900,141,597.87
  5. Step 5: Solve for x
    x = 7,900,141,597.87/81,387.19
  6. Step 6: Final answer
    x = 97,068.61

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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.