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Finding the Fourth Proportional to 99,793,085.60, 149,689,628.40 and 85,180,426.40

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Solution

The fourth proportional to 99,793,085.60, 149,689,628.40 and 85,180,426.40 is: 127,770,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,793,085.60 : 149,689,628.40 = 85,180,426.40 : x
  2. Step 2: Convert to fraction form
    99,793,085.60/149,689,628.40 = 85,180,426.40/x
  3. Step 3: Cross multiply
    99,793,085.60x = 149,689,628.40 × 85,180,426.40
  4. Step 4: Simplify right side
    99,793,085.60x = 12,750,626,374,769,552
  5. Step 5: Solve for x
    x = 12,750,626,374,769,552/99,793,085.60
  6. Step 6: Final answer
    x = 127,770,639.60

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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.