Home / 102,020.20-153,030.30-78,400.60

Finding the Fourth Proportional to 102,020.20, 153,030.30 and 78,400.60

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Solution

The fourth proportional to 102,020.20, 153,030.30 and 78,400.60 is: 117,600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,020.20 : 153,030.30 = 78,400.60 : x
  2. Step 2: Convert to fraction form
    102,020.20/153,030.30 = 78,400.60/x
  3. Step 3: Cross multiply
    102,020.20x = 153,030.30 × 78,400.60
  4. Step 4: Simplify right side
    102,020.20x = 11,997,667,338.18
  5. Step 5: Solve for x
    x = 11,997,667,338.18/102,020.20
  6. Step 6: Final answer
    x = 117,600.90

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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.