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Finding the Fourth Proportional to 99,813,881.60, 149,720,822.40 and 85,201,222.40

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Solution

The fourth proportional to 99,813,881.60, 149,720,822.40 and 85,201,222.40 is: 127,801,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,813,881.60 : 149,720,822.40 = 85,201,222.40 : x
  2. Step 2: Convert to fraction form
    99,813,881.60/149,720,822.40 = 85,201,222.40/x
  3. Step 3: Cross multiply
    99,813,881.60x = 149,720,822.40 × 85,201,222.40
  4. Step 4: Simplify right side
    99,813,881.60x = 12,756,397,087,213,304
  5. Step 5: Solve for x
    x = 12,756,397,087,213,304/99,813,881.60
  6. Step 6: Final answer
    x = 127,801,833.60

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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.