Home / 135,386.99-186,853.71-78,015.14

Finding the Fourth Proportional to 135,386.99, 186,853.71 and 78,015.14

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Solution

The fourth proportional to 135,386.99, 186,853.71 and 78,015.14 is: 107,672.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,386.99 : 186,853.71 = 78,015.14 : x
  2. Step 2: Convert to fraction form
    135,386.99/186,853.71 = 78,015.14/x
  3. Step 3: Cross multiply
    135,386.99x = 186,853.71 × 78,015.14
  4. Step 4: Simplify right side
    135,386.99x = 14,577,418,345.17
  5. Step 5: Solve for x
    x = 14,577,418,345.17/135,386.99
  6. Step 6: Final answer
    x = 107,672.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.