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Finding the Fourth Proportional to 76,886.55, 115,295.13 and 32,490.45

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Solution

The fourth proportional to 76,886.55, 115,295.13 and 32,490.45 is: 48,721.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,886.55 : 115,295.13 = 32,490.45 : x
  2. Step 2: Convert to fraction form
    76,886.55/115,295.13 = 32,490.45/x
  3. Step 3: Cross multiply
    76,886.55x = 115,295.13 × 32,490.45
  4. Step 4: Simplify right side
    76,886.55x = 3,745,990,656.51
  5. Step 5: Solve for x
    x = 3,745,990,656.51/76,886.55
  6. Step 6: Final answer
    x = 48,721.01

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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.