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Finding the Fourth Proportional to 99,663,933.60, 149,495,900.40 and 83,880,135.90

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Solution

The fourth proportional to 99,663,933.60, 149,495,900.40 and 83,880,135.90 is: 125,820,203.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,663,933.60 : 149,495,900.40 = 83,880,135.90 : x
  2. Step 2: Convert to fraction form
    99,663,933.60/149,495,900.40 = 83,880,135.90/x
  3. Step 3: Cross multiply
    99,663,933.60x = 149,495,900.40 × 83,880,135.90
  4. Step 4: Simplify right side
    99,663,933.60x = 12,539,736,442,044,866
  5. Step 5: Solve for x
    x = 12,539,736,442,044,866/99,663,933.60
  6. Step 6: Final answer
    x = 125,820,203.85

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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.