Home / 112,743,615.20-169,115,422.80-85,869,759.20

Finding the Fourth Proportional to 112,743,615.20, 169,115,422.80 and 85,869,759.20

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Solution

The fourth proportional to 112,743,615.20, 169,115,422.80 and 85,869,759.20 is: 128,804,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,743,615.20 : 169,115,422.80 = 85,869,759.20 : x
  2. Step 2: Convert to fraction form
    112,743,615.20/169,115,422.80 = 85,869,759.20/x
  3. Step 3: Cross multiply
    112,743,615.20x = 169,115,422.80 × 85,869,759.20
  4. Step 4: Simplify right side
    112,743,615.20x = 14,521,900,632,842,192
  5. Step 5: Solve for x
    x = 14,521,900,632,842,192/112,743,615.20
  6. Step 6: Final answer
    x = 128,804,638.80

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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.