Home / 80,688.40-111,352.12-44,390.78

Finding the Fourth Proportional to 80,688.40, 111,352.12 and 44,390.78

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Solution

The fourth proportional to 80,688.40, 111,352.12 and 44,390.78 is: 61,260.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,688.40 : 111,352.12 = 44,390.78 : x
  2. Step 2: Convert to fraction form
    80,688.40/111,352.12 = 44,390.78/x
  3. Step 3: Cross multiply
    80,688.40x = 111,352.12 × 44,390.78
  4. Step 4: Simplify right side
    80,688.40x = 4,943,007,837.64
  5. Step 5: Solve for x
    x = 4,943,007,837.64/80,688.40
  6. Step 6: Final answer
    x = 61,260.45

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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.