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Finding the Fourth Proportional to 139,681.87, 209,555.61 and 39,843.50

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Solution

The fourth proportional to 139,681.87, 209,555.61 and 39,843.50 is: 59,774.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,681.87 : 209,555.61 = 39,843.50 : x
  2. Step 2: Convert to fraction form
    139,681.87/209,555.61 = 39,843.50/x
  3. Step 3: Cross multiply
    139,681.87x = 209,555.61 × 39,843.50
  4. Step 4: Simplify right side
    139,681.87x = 8,349,427,749.84
  5. Step 5: Solve for x
    x = 8,349,427,749.84/139,681.87
  6. Step 6: Final answer
    x = 59,774.60

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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.