Home / 138,013.85-190,446.23-77,579.21

Finding the Fourth Proportional to 138,013.85, 190,446.23 and 77,579.21

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Solution

The fourth proportional to 138,013.85, 190,446.23 and 77,579.21 is: 107,052.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,013.85 : 190,446.23 = 77,579.21 : x
  2. Step 2: Convert to fraction form
    138,013.85/190,446.23 = 77,579.21/x
  3. Step 3: Cross multiply
    138,013.85x = 190,446.23 × 77,579.21
  4. Step 4: Simplify right side
    138,013.85x = 14,774,667,312.60
  5. Step 5: Solve for x
    x = 14,774,667,312.60/138,013.85
  6. Step 6: Final answer
    x = 107,052.07

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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.