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Finding the Fourth Proportional to 99,079.63, 148,617.72 and 39,913.78

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Solution

The fourth proportional to 99,079.63, 148,617.72 and 39,913.78 is: 59,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,079.63 : 148,617.72 = 39,913.78 : x
  2. Step 2: Convert to fraction form
    99,079.63/148,617.72 = 39,913.78/x
  3. Step 3: Cross multiply
    99,079.63x = 148,617.72 × 39,913.78
  4. Step 4: Simplify right side
    99,079.63x = 5,931,894,980.18
  5. Step 5: Solve for x
    x = 5,931,894,980.18/99,079.63
  6. Step 6: Final answer
    x = 59,869.98

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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.