Home / 72,019.20-99,346.56-42,205.44

Finding the Fourth Proportional to 72,019.20, 99,346.56 and 42,205.44

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Solution

The fourth proportional to 72,019.20, 99,346.56 and 42,205.44 is: 58,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,019.20 : 99,346.56 = 42,205.44 : x
  2. Step 2: Convert to fraction form
    72,019.20/99,346.56 = 42,205.44/x
  3. Step 3: Cross multiply
    72,019.20x = 99,346.56 × 42,205.44
  4. Step 4: Simplify right side
    72,019.20x = 4,192,965,277.29
  5. Step 5: Solve for x
    x = 4,192,965,277.29/72,019.20
  6. Step 6: Final answer
    x = 58,220.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.