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Finding the Fourth Proportional to 99,128.94, 136,753.29 and 58,844.40

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Solution

The fourth proportional to 99,128.94, 136,753.29 and 58,844.40 is: 81,178.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,128.94 : 136,753.29 = 58,844.40 : x
  2. Step 2: Convert to fraction form
    99,128.94/136,753.29 = 58,844.40/x
  3. Step 3: Cross multiply
    99,128.94x = 136,753.29 × 58,844.40
  4. Step 4: Simplify right side
    99,128.94x = 8,047,165,298.08
  5. Step 5: Solve for x
    x = 8,047,165,298.08/99,128.94
  6. Step 6: Final answer
    x = 81,178.77

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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.