Home / 86,209,781.80-129,314,672.70-76,856,420.20

Finding the Fourth Proportional to 86,209,781.80, 129,314,672.70 and 76,856,420.20

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Solution

The fourth proportional to 86,209,781.80, 129,314,672.70 and 76,856,420.20 is: 115,284,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,209,781.80 : 129,314,672.70 = 76,856,420.20 : x
  2. Step 2: Convert to fraction form
    86,209,781.80/129,314,672.70 = 76,856,420.20/x
  3. Step 3: Cross multiply
    86,209,781.80x = 129,314,672.70 × 76,856,420.20
  4. Step 4: Simplify right side
    86,209,781.80x = 9,938,662,823,056,670
  5. Step 5: Solve for x
    x = 9,938,662,823,056,670/86,209,781.80
  6. Step 6: Final answer
    x = 115,284,630.30

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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.