Home / 78,716.98-108,628.32-42,907.13

Finding the Fourth Proportional to 78,716.98, 108,628.32 and 42,907.13

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Solution

The fourth proportional to 78,716.98, 108,628.32 and 42,907.13 is: 59,211.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,716.98 : 108,628.32 = 42,907.13 : x
  2. Step 2: Convert to fraction form
    78,716.98/108,628.32 = 42,907.13/x
  3. Step 3: Cross multiply
    78,716.98x = 108,628.32 × 42,907.13
  4. Step 4: Simplify right side
    78,716.98x = 4,660,929,473.04
  5. Step 5: Solve for x
    x = 4,660,929,473.04/78,716.98
  6. Step 6: Final answer
    x = 59,211.23

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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.