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Finding the Fourth Proportional to 98,765.72, 148,181.83 and 31,308.77

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Solution

The fourth proportional to 98,765.72, 148,181.83 and 31,308.77 is: 46,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,765.72 : 148,181.83 = 31,308.77 : x
  2. Step 2: Convert to fraction form
    98,765.72/148,181.83 = 31,308.77/x
  3. Step 3: Cross multiply
    98,765.72x = 148,181.83 × 31,308.77
  4. Step 4: Simplify right side
    98,765.72x = 4,639,390,833.65
  5. Step 5: Solve for x
    x = 4,639,390,833.65/98,765.72
  6. Step 6: Final answer
    x = 46,973.70

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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.