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Finding the Fourth Proportional to 137,828.40, 206,483.40 and 71,041.20

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Solution

The fourth proportional to 137,828.40, 206,483.40 and 71,041.20 is: 106,428.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,828.40 : 206,483.40 = 71,041.20 : x
  2. Step 2: Convert to fraction form
    137,828.40/206,483.40 = 71,041.20/x
  3. Step 3: Cross multiply
    137,828.40x = 206,483.40 × 71,041.20
  4. Step 4: Simplify right side
    137,828.40x = 14,668,828,516.08
  5. Step 5: Solve for x
    x = 14,668,828,516.08/137,828.40
  6. Step 6: Final answer
    x = 106,428.20

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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.