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Finding the Fourth Proportional to 188,497.72, 260,123.16 and 103,616.20

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Solution

The fourth proportional to 188,497.72, 260,123.16 and 103,616.20 is: 142,988.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,497.72 : 260,123.16 = 103,616.20 : x
  2. Step 2: Convert to fraction form
    188,497.72/260,123.16 = 103,616.20/x
  3. Step 3: Cross multiply
    188,497.72x = 260,123.16 × 103,616.20
  4. Step 4: Simplify right side
    188,497.72x = 26,952,973,371.19
  5. Step 5: Solve for x
    x = 26,952,973,371.19/188,497.72
  6. Step 6: Final answer
    x = 142,988.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.