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Finding the Fourth Proportional to 78,886.60, 118,329.90 and 49,337.80

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Solution

The fourth proportional to 78,886.60, 118,329.90 and 49,337.80 is: 74,006.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,886.60 : 118,329.90 = 49,337.80 : x
  2. Step 2: Convert to fraction form
    78,886.60/118,329.90 = 49,337.80/x
  3. Step 3: Cross multiply
    78,886.60x = 118,329.90 × 49,337.80
  4. Step 4: Simplify right side
    78,886.60x = 5,838,136,940.22
  5. Step 5: Solve for x
    x = 5,838,136,940.22/78,886.60
  6. Step 6: Final answer
    x = 74,006.70

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1.5x scale

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.