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Finding the Fourth Proportional to 189,987, 285,062.58 and 101,215.32

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Solution

The fourth proportional to 189,987, 285,062.58 and 101,215.32 is: 151,866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,987 : 285,062.58 = 101,215.32 : x
  2. Step 2: Convert to fraction form
    189,987/285,062.58 = 101,215.32/x
  3. Step 3: Cross multiply
    189,987x = 285,062.58 × 101,215.32
  4. Step 4: Simplify right side
    189,987x = 28,852,700,254.73
  5. Step 5: Solve for x
    x = 28,852,700,254.73/189,987
  6. Step 6: Final answer
    x = 151,866.71

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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.