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Finding the Fourth Proportional to 118,870.60, 178,046.70 and 105,737.80

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Solution

The fourth proportional to 118,870.60, 178,046.70 and 105,737.80 is: 158,376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,870.60 : 178,046.70 = 105,737.80 : x
  2. Step 2: Convert to fraction form
    118,870.60/178,046.70 = 105,737.80/x
  3. Step 3: Cross multiply
    118,870.60x = 178,046.70 × 105,737.80
  4. Step 4: Simplify right side
    118,870.60x = 18,826,266,355.26
  5. Step 5: Solve for x
    x = 18,826,266,355.26/118,870.60
  6. Step 6: Final answer
    x = 158,376.14

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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.