Home / 78,578.11-108,437.46-42,768.16

Finding the Fourth Proportional to 78,578.11, 108,437.46 and 42,768.16

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Solution

The fourth proportional to 78,578.11, 108,437.46 and 42,768.16 is: 59,019.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,578.11 : 108,437.46 = 42,768.16 : x
  2. Step 2: Convert to fraction form
    78,578.11/108,437.46 = 42,768.16/x
  3. Step 3: Cross multiply
    78,578.11x = 108,437.46 × 42,768.16
  4. Step 4: Simplify right side
    78,578.11x = 4,637,670,639.27
  5. Step 5: Solve for x
    x = 4,637,670,639.27/78,578.11
  6. Step 6: Final answer
    x = 59,019.88

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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.