Home / 78,412.10-117,618.75-19,248.28

Finding the Fourth Proportional to 78,412.10, 117,618.75 and 19,248.28

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Solution

The fourth proportional to 78,412.10, 117,618.75 and 19,248.28 is: 28,872.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,412.10 : 117,618.75 = 19,248.28 : x
  2. Step 2: Convert to fraction form
    78,412.10/117,618.75 = 19,248.28/x
  3. Step 3: Cross multiply
    78,412.10x = 117,618.75 × 19,248.28
  4. Step 4: Simplify right side
    78,412.10x = 2,263,958,339.20
  5. Step 5: Solve for x
    x = 2,263,958,339.20/78,412.10
  6. Step 6: Final answer
    x = 28,872.57

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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.