Home / 78,758,812.80-118,138,219.20-21,250,991.70

Finding the Fourth Proportional to 78,758,812.80, 118,138,219.20 and 21,250,991.70

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Solution

The fourth proportional to 78,758,812.80, 118,138,219.20 and 21,250,991.70 is: 31,876,487.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,758,812.80 : 118,138,219.20 = 21,250,991.70 : x
  2. Step 2: Convert to fraction form
    78,758,812.80/118,138,219.20 = 21,250,991.70/x
  3. Step 3: Cross multiply
    78,758,812.80x = 118,138,219.20 × 21,250,991.70
  4. Step 4: Simplify right side
    78,758,812.80x = 2,510,554,315,671,980.50
  5. Step 5: Solve for x
    x = 2,510,554,315,671,980.50/78,758,812.80
  6. Step 6: Final answer
    x = 31,876,487.55

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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.