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Finding the Fourth Proportional to 139,953,346.40, 209,930,019.60 and 89,060,981.60

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Solution

The fourth proportional to 139,953,346.40, 209,930,019.60 and 89,060,981.60 is: 133,591,472.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,953,346.40 : 209,930,019.60 = 89,060,981.60 : x
  2. Step 2: Convert to fraction form
    139,953,346.40/209,930,019.60 = 89,060,981.60/x
  3. Step 3: Cross multiply
    139,953,346.40x = 209,930,019.60 × 89,060,981.60
  4. Step 4: Simplify right side
    139,953,346.40x = 18,696,573,612,883,236
  5. Step 5: Solve for x
    x = 18,696,573,612,883,236/139,953,346.40
  6. Step 6: Final answer
    x = 133,591,472.40

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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.