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Finding the Fourth Proportional to 89,833.76, 134,750.28 and 70,128.80

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Solution

The fourth proportional to 89,833.76, 134,750.28 and 70,128.80 is: 105,192.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,833.76 : 134,750.28 = 70,128.80 : x
  2. Step 2: Convert to fraction form
    89,833.76/134,750.28 = 70,128.80/x
  3. Step 3: Cross multiply
    89,833.76x = 134,750.28 × 70,128.80
  4. Step 4: Simplify right side
    89,833.76x = 9,449,875,436.06
  5. Step 5: Solve for x
    x = 9,449,875,436.06/89,833.76
  6. Step 6: Final answer
    x = 105,192.92

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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.