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Finding the Fourth Proportional to 139,640.06, 209,428.52 and 39,798.12

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Solution

The fourth proportional to 139,640.06, 209,428.52 and 39,798.12 is: 59,688.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,640.06 : 209,428.52 = 39,798.12 : x
  2. Step 2: Convert to fraction form
    139,640.06/209,428.52 = 39,798.12/x
  3. Step 3: Cross multiply
    139,640.06x = 209,428.52 × 39,798.12
  4. Step 4: Simplify right side
    139,640.06x = 8,334,861,370.38
  5. Step 5: Solve for x
    x = 8,334,861,370.38/139,640.06
  6. Step 6: Final answer
    x = 59,688.18

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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.