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Finding the Fourth Proportional to 52,686.93, 78,950.80 and 21,065.74

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Solution

The fourth proportional to 52,686.93, 78,950.80 and 21,065.74 is: 31,566.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,686.93 : 78,950.80 = 21,065.74 : x
  2. Step 2: Convert to fraction form
    52,686.93/78,950.80 = 21,065.74/x
  3. Step 3: Cross multiply
    52,686.93x = 78,950.80 × 21,065.74
  4. Step 4: Simplify right side
    52,686.93x = 1,663,157,025.59
  5. Step 5: Solve for x
    x = 1,663,157,025.59/52,686.93
  6. Step 6: Final answer
    x = 31,566.79

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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.