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Finding the Fourth Proportional to 188,972, 260,777.40 and 104,089.76

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Solution

The fourth proportional to 188,972, 260,777.40 and 104,089.76 is: 143,641.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,972 : 260,777.40 = 104,089.76 : x
  2. Step 2: Convert to fraction form
    188,972/260,777.40 = 104,089.76/x
  3. Step 3: Cross multiply
    188,972x = 260,777.40 × 104,089.76
  4. Step 4: Simplify right side
    188,972x = 27,144,256,979.42
  5. Step 5: Solve for x
    x = 27,144,256,979.42/188,972
  6. Step 6: Final answer
    x = 143,641.69

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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.