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Finding the Fourth Proportional to 99,663,934.60, 149,495,901.90 and 83,880,136.90

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Solution

The fourth proportional to 99,663,934.60, 149,495,901.90 and 83,880,136.90 is: 125,820,205.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,663,934.60 : 149,495,901.90 = 83,880,136.90 : x
  2. Step 2: Convert to fraction form
    99,663,934.60/149,495,901.90 = 83,880,136.90/x
  3. Step 3: Cross multiply
    99,663,934.60x = 149,495,901.90 × 83,880,136.90
  4. Step 4: Simplify right side
    99,663,934.60x = 12,539,736,717,360,972
  5. Step 5: Solve for x
    x = 12,539,736,717,360,972/99,663,934.60
  6. Step 6: Final answer
    x = 125,820,205.35

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1.5x scale

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.