Home / 78,290.66-117,448.24-25,688.18

Finding the Fourth Proportional to 78,290.66, 117,448.24 and 25,688.18

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Solution

The fourth proportional to 78,290.66, 117,448.24 and 25,688.18 is: 38,536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,290.66 : 117,448.24 = 25,688.18 : x
  2. Step 2: Convert to fraction form
    78,290.66/117,448.24 = 25,688.18/x
  3. Step 3: Cross multiply
    78,290.66x = 117,448.24 × 25,688.18
  4. Step 4: Simplify right side
    78,290.66x = 3,017,031,529.80
  5. Step 5: Solve for x
    x = 3,017,031,529.80/78,290.66
  6. Step 6: Final answer
    x = 38,536.29

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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.