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Finding the Fourth Proportional to 138,871.16, 208,898.04 and 125,880.40

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Solution

The fourth proportional to 138,871.16, 208,898.04 and 125,880.40 is: 189,356.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,871.16 : 208,898.04 = 125,880.40 : x
  2. Step 2: Convert to fraction form
    138,871.16/208,898.04 = 125,880.40/x
  3. Step 3: Cross multiply
    138,871.16x = 208,898.04 × 125,880.40
  4. Step 4: Simplify right side
    138,871.16x = 26,296,168,834.42
  5. Step 5: Solve for x
    x = 26,296,168,834.42/138,871.16
  6. Step 6: Final answer
    x = 189,356.59

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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.