Home / 138,723.30-191,444.04-87,717.60

Finding the Fourth Proportional to 138,723.30, 191,444.04 and 87,717.60

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Solution

The fourth proportional to 138,723.30, 191,444.04 and 87,717.60 is: 121,054.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,723.30 : 191,444.04 = 87,717.60 : x
  2. Step 2: Convert to fraction form
    138,723.30/191,444.04 = 87,717.60/x
  3. Step 3: Cross multiply
    138,723.30x = 191,444.04 × 87,717.60
  4. Step 4: Simplify right side
    138,723.30x = 16,793,011,723.10
  5. Step 5: Solve for x
    x = 16,793,011,723.10/138,723.30
  6. Step 6: Final answer
    x = 121,054.01

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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.