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Finding the Fourth Proportional to 52,089.54, 78,134.78 and 12,646.99

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Solution

The fourth proportional to 52,089.54, 78,134.78 and 12,646.99 is: 18,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,089.54 : 78,134.78 = 12,646.99 : x
  2. Step 2: Convert to fraction form
    52,089.54/78,134.78 = 12,646.99/x
  3. Step 3: Cross multiply
    52,089.54x = 78,134.78 × 12,646.99
  4. Step 4: Simplify right side
    52,089.54x = 988,169,781.31
  5. Step 5: Solve for x
    x = 988,169,781.31/52,089.54
  6. Step 6: Final answer
    x = 18,970.60

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1.5x scale

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.