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Finding the Fourth Proportional to 139,915.46, 209,903.07 and 45,151.02

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Solution

The fourth proportional to 139,915.46, 209,903.07 and 45,151.02 is: 67,736.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,915.46 : 209,903.07 = 45,151.02 : x
  2. Step 2: Convert to fraction form
    139,915.46/209,903.07 = 45,151.02/x
  3. Step 3: Cross multiply
    139,915.46x = 209,903.07 × 45,151.02
  4. Step 4: Simplify right side
    139,915.46x = 9,477,337,711.63
  5. Step 5: Solve for x
    x = 9,477,337,711.63/139,915.46
  6. Step 6: Final answer
    x = 67,736.17

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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.