Home / 52,100.20-78,150.30-12,657.05

Finding the Fourth Proportional to 52,100.20, 78,150.30 and 12,657.05

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Solution

The fourth proportional to 52,100.20, 78,150.30 and 12,657.05 is: 18,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,100.20 : 78,150.30 = 12,657.05 : x
  2. Step 2: Convert to fraction form
    52,100.20/78,150.30 = 12,657.05/x
  3. Step 3: Cross multiply
    52,100.20x = 78,150.30 × 12,657.05
  4. Step 4: Simplify right side
    52,100.20x = 989,152,254.62
  5. Step 5: Solve for x
    x = 989,152,254.62/52,100.20
  6. Step 6: Final answer
    x = 18,985.58

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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.