Home / 78,366.32-117,548.84-31,618.48

Finding the Fourth Proportional to 78,366.32, 117,548.84 and 31,618.48

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Solution

The fourth proportional to 78,366.32, 117,548.84 and 31,618.48 is: 47,427.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,366.32 : 117,548.84 = 31,618.48 : x
  2. Step 2: Convert to fraction form
    78,366.32/117,548.84 = 31,618.48/x
  3. Step 3: Cross multiply
    78,366.32x = 117,548.84 × 31,618.48
  4. Step 4: Simplify right side
    78,366.32x = 3,716,715,646.56
  5. Step 5: Solve for x
    x = 3,716,715,646.56/78,366.32
  6. Step 6: Final answer
    x = 47,427.46

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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.