Home / 78,868,470.80-118,302,706.20-65,431,542.80

Finding the Fourth Proportional to 78,868,470.80, 118,302,706.20 and 65,431,542.80

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Solution

The fourth proportional to 78,868,470.80, 118,302,706.20 and 65,431,542.80 is: 98,147,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,868,470.80 : 118,302,706.20 = 65,431,542.80 : x
  2. Step 2: Convert to fraction form
    78,868,470.80/118,302,706.20 = 65,431,542.80/x
  3. Step 3: Cross multiply
    78,868,470.80x = 118,302,706.20 × 65,431,542.80
  4. Step 4: Simplify right side
    78,868,470.80x = 7,740,728,584,081,125
  5. Step 5: Solve for x
    x = 7,740,728,584,081,125/78,868,470.80
  6. Step 6: Final answer
    x = 98,147,314.20

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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.