Home / 52,145.10-78,217.65-18,870.30

Finding the Fourth Proportional to 52,145.10, 78,217.65 and 18,870.30

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Solution

The fourth proportional to 52,145.10, 78,217.65 and 18,870.30 is: 28,305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,145.10 : 78,217.65 = 18,870.30 : x
  2. Step 2: Convert to fraction form
    52,145.10/78,217.65 = 18,870.30/x
  3. Step 3: Cross multiply
    52,145.10x = 78,217.65 × 18,870.30
  4. Step 4: Simplify right side
    52,145.10x = 1,475,990,520.80
  5. Step 5: Solve for x
    x = 1,475,990,520.80/52,145.10
  6. Step 6: Final answer
    x = 28,305.45

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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.