Home / 138,283.85-190,835.33-77,856.72

Finding the Fourth Proportional to 138,283.85, 190,835.33 and 77,856.72

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Solution

The fourth proportional to 138,283.85, 190,835.33 and 77,856.72 is: 107,444.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,283.85 : 190,835.33 = 77,856.72 : x
  2. Step 2: Convert to fraction form
    138,283.85/190,835.33 = 77,856.72/x
  3. Step 3: Cross multiply
    138,283.85x = 190,835.33 × 77,856.72
  4. Step 4: Simplify right side
    138,283.85x = 14,857,811,510.46
  5. Step 5: Solve for x
    x = 14,857,811,510.46/138,283.85
  6. Step 6: Final answer
    x = 107,444.30

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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.