Home / 78,279.21-117,437.04-25,685.51

Finding the Fourth Proportional to 78,279.21, 117,437.04 and 25,685.51

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Solution

The fourth proportional to 78,279.21, 117,437.04 and 25,685.51 is: 38,534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,279.21 : 117,437.04 = 25,685.51 : x
  2. Step 2: Convert to fraction form
    78,279.21/117,437.04 = 25,685.51/x
  3. Step 3: Cross multiply
    78,279.21x = 117,437.04 × 25,685.51
  4. Step 4: Simplify right side
    78,279.21x = 3,016,429,678.11
  5. Step 5: Solve for x
    x = 3,016,429,678.11/78,279.21
  6. Step 6: Final answer
    x = 38,534.24

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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.