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Finding the Fourth Proportional to 139,411.80, 209,117.70 and 34,229.40

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Solution

The fourth proportional to 139,411.80, 209,117.70 and 34,229.40 is: 51,344.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,411.80 : 209,117.70 = 34,229.40 : x
  2. Step 2: Convert to fraction form
    139,411.80/209,117.70 = 34,229.40/x
  3. Step 3: Cross multiply
    139,411.80x = 209,117.70 × 34,229.40
  4. Step 4: Simplify right side
    139,411.80x = 7,157,973,400.38
  5. Step 5: Solve for x
    x = 7,157,973,400.38/139,411.80
  6. Step 6: Final answer
    x = 51,344.10

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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.