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Finding the Fourth Proportional to 128,848, 193,403.04 and 88,869.76

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Solution

The fourth proportional to 128,848, 193,403.04 and 88,869.76 is: 133,395.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848 : 193,403.04 = 88,869.76 : x
  2. Step 2: Convert to fraction form
    128,848/193,403.04 = 88,869.76/x
  3. Step 3: Cross multiply
    128,848x = 193,403.04 × 88,869.76
  4. Step 4: Simplify right side
    128,848x = 17,187,681,748.07
  5. Step 5: Solve for x
    x = 17,187,681,748.07/128,848
  6. Step 6: Final answer
    x = 133,395.02

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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.