Home / 81,952,990.40-122,929,485.60-78,173,854.40

Finding the Fourth Proportional to 81,952,990.40, 122,929,485.60 and 78,173,854.40

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Solution

The fourth proportional to 81,952,990.40, 122,929,485.60 and 78,173,854.40 is: 117,260,781.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,952,990.40 : 122,929,485.60 = 78,173,854.40 : x
  2. Step 2: Convert to fraction form
    81,952,990.40/122,929,485.60 = 78,173,854.40/x
  3. Step 3: Cross multiply
    81,952,990.40x = 122,929,485.60 × 78,173,854.40
  4. Step 4: Simplify right side
    81,952,990.40x = 9,609,871,708,761,296
  5. Step 5: Solve for x
    x = 9,609,871,708,761,296/81,952,990.40
  6. Step 6: Final answer
    x = 117,260,781.60

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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.