Home / 52,086.84-78,130.40-12,643.89

Finding the Fourth Proportional to 52,086.84, 78,130.40 and 12,643.89

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Solution

The fourth proportional to 52,086.84, 78,130.40 and 12,643.89 is: 18,965.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,086.84 : 78,130.40 = 12,643.89 : x
  2. Step 2: Convert to fraction form
    52,086.84/78,130.40 = 12,643.89/x
  3. Step 3: Cross multiply
    52,086.84x = 78,130.40 × 12,643.89
  4. Step 4: Simplify right side
    52,086.84x = 987,872,120.04
  5. Step 5: Solve for x
    x = 987,872,120.04/52,086.84
  6. Step 6: Final answer
    x = 18,965.87

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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.