Home / 138,572.76-191,232.18-84,109.20

Finding the Fourth Proportional to 138,572.76, 191,232.18 and 84,109.20

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Solution

The fourth proportional to 138,572.76, 191,232.18 and 84,109.20 is: 116,071.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,572.76 : 191,232.18 = 84,109.20 : x
  2. Step 2: Convert to fraction form
    138,572.76/191,232.18 = 84,109.20/x
  3. Step 3: Cross multiply
    138,572.76x = 191,232.18 × 84,109.20
  4. Step 4: Simplify right side
    138,572.76x = 16,084,385,674.06
  5. Step 5: Solve for x
    x = 16,084,385,674.06/138,572.76
  6. Step 6: Final answer
    x = 116,071.77

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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.