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Finding the Fourth Proportional to 86,672.95, 130,009.43 and 49,218.55

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Solution

The fourth proportional to 86,672.95, 130,009.43 and 49,218.55 is: 73,827.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,672.95 : 130,009.43 = 49,218.55 : x
  2. Step 2: Convert to fraction form
    86,672.95/130,009.43 = 49,218.55/x
  3. Step 3: Cross multiply
    86,672.95x = 130,009.43 × 49,218.55
  4. Step 4: Simplify right side
    86,672.95x = 6,398,875,384.83
  5. Step 5: Solve for x
    x = 6,398,875,384.83/86,672.95
  6. Step 6: Final answer
    x = 73,827.83

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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.