Home / 138,283.35-190,834.63-77,856.21

Finding the Fourth Proportional to 138,283.35, 190,834.63 and 77,856.21

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Solution

The fourth proportional to 138,283.35, 190,834.63 and 77,856.21 is: 107,443.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,283.35 : 190,834.63 = 77,856.21 : x
  2. Step 2: Convert to fraction form
    138,283.35/190,834.63 = 77,856.21/x
  3. Step 3: Cross multiply
    138,283.35x = 190,834.63 × 77,856.21
  4. Step 4: Simplify right side
    138,283.35x = 14,857,661,808.58
  5. Step 5: Solve for x
    x = 14,857,661,808.58/138,283.35
  6. Step 6: Final answer
    x = 107,443.60

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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.