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Finding the Fourth Proportional to 89,264.40, 133,637.40 and 86,672.40

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Solution

The fourth proportional to 89,264.40, 133,637.40 and 86,672.40 is: 129,756.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,264.40 : 133,637.40 = 86,672.40 : x
  2. Step 2: Convert to fraction form
    89,264.40/133,637.40 = 86,672.40/x
  3. Step 3: Cross multiply
    89,264.40x = 133,637.40 × 86,672.40
  4. Step 4: Simplify right side
    89,264.40x = 11,582,674,187.76
  5. Step 5: Solve for x
    x = 11,582,674,187.76/89,264.40
  6. Step 6: Final answer
    x = 129,756.93

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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.