Home / 78,815.20-118,222.80-49,266.40

Finding the Fourth Proportional to 78,815.20, 118,222.80 and 49,266.40

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Solution

The fourth proportional to 78,815.20, 118,222.80 and 49,266.40 is: 73,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,815.20 : 118,222.80 = 49,266.40 : x
  2. Step 2: Convert to fraction form
    78,815.20/118,222.80 = 49,266.40/x
  3. Step 3: Cross multiply
    78,815.20x = 118,222.80 × 49,266.40
  4. Step 4: Simplify right side
    78,815.20x = 5,824,411,753.92
  5. Step 5: Solve for x
    x = 5,824,411,753.92/78,815.20
  6. Step 6: Final answer
    x = 73,899.60

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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.