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Finding the Fourth Proportional to 139,568.23, 209,320.90 and 39,726.21

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Solution

The fourth proportional to 139,568.23, 209,320.90 and 39,726.21 is: 59,580.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,568.23 : 209,320.90 = 39,726.21 : x
  2. Step 2: Convert to fraction form
    139,568.23/209,320.90 = 39,726.21/x
  3. Step 3: Cross multiply
    139,568.23x = 209,320.90 × 39,726.21
  4. Step 4: Simplify right side
    139,568.23x = 8,315,525,931.47
  5. Step 5: Solve for x
    x = 8,315,525,931.47/139,568.23
  6. Step 6: Final answer
    x = 59,580.36

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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.