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Finding the Fourth Proportional to 99,908.42, 149,862.63 and 40,748.72

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Solution

The fourth proportional to 99,908.42, 149,862.63 and 40,748.72 is: 61,123.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,908.42 : 149,862.63 = 40,748.72 : x
  2. Step 2: Convert to fraction form
    99,908.42/149,862.63 = 40,748.72/x
  3. Step 3: Cross multiply
    99,908.42x = 149,862.63 × 40,748.72
  4. Step 4: Simplify right side
    99,908.42x = 6,106,709,599.02
  5. Step 5: Solve for x
    x = 6,106,709,599.02/99,908.42
  6. Step 6: Final answer
    x = 61,123.08

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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.