Home / 81,239.32-112,120.71-45,431.35

Finding the Fourth Proportional to 81,239.32, 112,120.71 and 45,431.35

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Solution

The fourth proportional to 81,239.32, 112,120.71 and 45,431.35 is: 62,701.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,239.32 : 112,120.71 = 45,431.35 : x
  2. Step 2: Convert to fraction form
    81,239.32/112,120.71 = 45,431.35/x
  3. Step 3: Cross multiply
    81,239.32x = 112,120.71 × 45,431.35
  4. Step 4: Simplify right side
    81,239.32x = 5,093,794,767.59
  5. Step 5: Solve for x
    x = 5,093,794,767.59/81,239.32
  6. Step 6: Final answer
    x = 62,701.10

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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.