Home / 90,145,115.34-134,459,766.35-81,869,551.38

Finding the Fourth Proportional to 90,145,115.34, 134,459,766.35 and 81,869,551.38

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Solution

The fourth proportional to 90,145,115.34, 134,459,766.35 and 81,869,551.38 is: 122,115,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,145,115.34 : 134,459,766.35 = 81,869,551.38 : x
  2. Step 2: Convert to fraction form
    90,145,115.34/134,459,766.35 = 81,869,551.38/x
  3. Step 3: Cross multiply
    90,145,115.34x = 134,459,766.35 × 81,869,551.38
  4. Step 4: Simplify right side
    90,145,115.34x = 11,008,160,750,009,614
  5. Step 5: Solve for x
    x = 11,008,160,750,009,614/90,145,115.34
  6. Step 6: Final answer
    x = 122,115,998.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.