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Finding the Fourth Proportional to 103,787.80, 155,681.70 and 99,237.40

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Solution

The fourth proportional to 103,787.80, 155,681.70 and 99,237.40 is: 148,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,787.80 : 155,681.70 = 99,237.40 : x
  2. Step 2: Convert to fraction form
    103,787.80/155,681.70 = 99,237.40/x
  3. Step 3: Cross multiply
    103,787.80x = 155,681.70 × 99,237.40
  4. Step 4: Simplify right side
    103,787.80x = 15,449,447,135.58
  5. Step 5: Solve for x
    x = 15,449,447,135.58/103,787.80
  6. Step 6: Final answer
    x = 148,856.10

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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.