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Finding the Fourth Proportional to 99,361.70, 137,117.80 and 54,038.70

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Solution

The fourth proportional to 99,361.70, 137,117.80 and 54,038.70 is: 74,572.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,361.70 : 137,117.80 = 54,038.70 : x
  2. Step 2: Convert to fraction form
    99,361.70/137,117.80 = 54,038.70/x
  3. Step 3: Cross multiply
    99,361.70x = 137,117.80 × 54,038.70
  4. Step 4: Simplify right side
    99,361.70x = 7,409,667,523.76
  5. Step 5: Solve for x
    x = 7,409,667,523.76/99,361.70
  6. Step 6: Final answer
    x = 74,572.68

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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.