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Finding the Fourth Proportional to 99,203.52, 136,899.36 and 56,772.48

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Solution

The fourth proportional to 99,203.52, 136,899.36 and 56,772.48 is: 78,345.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,203.52 : 136,899.36 = 56,772.48 : x
  2. Step 2: Convert to fraction form
    99,203.52/136,899.36 = 56,772.48/x
  3. Step 3: Cross multiply
    99,203.52x = 136,899.36 × 56,772.48
  4. Step 4: Simplify right side
    99,203.52x = 7,772,116,177.61
  5. Step 5: Solve for x
    x = 7,772,116,177.61/99,203.52
  6. Step 6: Final answer
    x = 78,345.17

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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.