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Finding the Fourth Proportional to 99,407.99, 136,994.06 and 71,064.47

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Solution

The fourth proportional to 99,407.99, 136,994.06 and 71,064.47 is: 97,933.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,407.99 : 136,994.06 = 71,064.47 : x
  2. Step 2: Convert to fraction form
    99,407.99/136,994.06 = 71,064.47/x
  3. Step 3: Cross multiply
    99,407.99x = 136,994.06 × 71,064.47
  4. Step 4: Simplify right side
    99,407.99x = 9,735,409,226.76
  5. Step 5: Solve for x
    x = 9,735,409,226.76/99,407.99
  6. Step 6: Final answer
    x = 97,933.88

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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.