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Finding the Fourth Proportional to 139,648.06, 209,440.53 and 39,806.11

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Solution

The fourth proportional to 139,648.06, 209,440.53 and 39,806.11 is: 59,700.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,648.06 : 209,440.53 = 39,806.11 : x
  2. Step 2: Convert to fraction form
    139,648.06/209,440.53 = 39,806.11/x
  3. Step 3: Cross multiply
    139,648.06x = 209,440.53 × 39,806.11
  4. Step 4: Simplify right side
    139,648.06x = 8,337,012,775.64
  5. Step 5: Solve for x
    x = 8,337,012,775.64/139,648.06
  6. Step 6: Final answer
    x = 59,700.17

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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.