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Finding the Fourth Proportional to 99,156.48, 136,703.88 and 71,908.08

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Solution

The fourth proportional to 99,156.48, 136,703.88 and 71,908.08 is: 99,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,156.48 : 136,703.88 = 71,908.08 : x
  2. Step 2: Convert to fraction form
    99,156.48/136,703.88 = 71,908.08/x
  3. Step 3: Cross multiply
    99,156.48x = 136,703.88 × 71,908.08
  4. Step 4: Simplify right side
    99,156.48x = 9,830,113,539.35
  5. Step 5: Solve for x
    x = 9,830,113,539.35/99,156.48
  6. Step 6: Final answer
    x = 99,137.38

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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.