Home / 89,412.84-134,654.16-81,441.36

Finding the Fourth Proportional to 89,412.84, 134,654.16 and 81,441.36

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Solution

The fourth proportional to 89,412.84, 134,654.16 and 81,441.36 is: 122,649.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,412.84 : 134,654.16 = 81,441.36 : x
  2. Step 2: Convert to fraction form
    89,412.84/134,654.16 = 81,441.36/x
  3. Step 3: Cross multiply
    89,412.84x = 134,654.16 × 81,441.36
  4. Step 4: Simplify right side
    89,412.84x = 10,966,417,920.06
  5. Step 5: Solve for x
    x = 10,966,417,920.06/89,412.84
  6. Step 6: Final answer
    x = 122,649.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.