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Finding the Fourth Proportional to 52,148.80, 78,230.40 and 18,860.80

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Solution

The fourth proportional to 52,148.80, 78,230.40 and 18,860.80 is: 28,293.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,148.80 : 78,230.40 = 18,860.80 : x
  2. Step 2: Convert to fraction form
    52,148.80/78,230.40 = 18,860.80/x
  3. Step 3: Cross multiply
    52,148.80x = 78,230.40 × 18,860.80
  4. Step 4: Simplify right side
    52,148.80x = 1,475,487,928.32
  5. Step 5: Solve for x
    x = 1,475,487,928.32/52,148.80
  6. Step 6: Final answer
    x = 28,293.80

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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.