Home / 78,156.64-117,183.12-25,547.68

Finding the Fourth Proportional to 78,156.64, 117,183.12 and 25,547.68

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Solution

The fourth proportional to 78,156.64, 117,183.12 and 25,547.68 is: 38,304.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,156.64 : 117,183.12 = 25,547.68 : x
  2. Step 2: Convert to fraction form
    78,156.64/117,183.12 = 25,547.68/x
  3. Step 3: Cross multiply
    78,156.64x = 117,183.12 × 25,547.68
  4. Step 4: Simplify right side
    78,156.64x = 2,993,756,851.16
  5. Step 5: Solve for x
    x = 2,993,756,851.16/78,156.64
  6. Step 6: Final answer
    x = 38,304.57

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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.