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Finding the Fourth Proportional to 52,140.80, 78,040.16 and 28,412.16

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Solution

The fourth proportional to 52,140.80, 78,040.16 and 28,412.16 is: 42,525.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,140.80 : 78,040.16 = 28,412.16 : x
  2. Step 2: Convert to fraction form
    52,140.80/78,040.16 = 28,412.16/x
  3. Step 3: Cross multiply
    52,140.80x = 78,040.16 × 28,412.16
  4. Step 4: Simplify right side
    52,140.80x = 2,217,289,512.35
  5. Step 5: Solve for x
    x = 2,217,289,512.35/52,140.80
  6. Step 6: Final answer
    x = 42,525.04

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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.