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Finding the Fourth Proportional to 138,739.70, 191,461.29 and 75,077.49

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Solution

The fourth proportional to 138,739.70, 191,461.29 and 75,077.49 is: 103,607.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,739.70 : 191,461.29 = 75,077.49 : x
  2. Step 2: Convert to fraction form
    138,739.70/191,461.29 = 75,077.49/x
  3. Step 3: Cross multiply
    138,739.70x = 191,461.29 × 75,077.49
  4. Step 4: Simplify right side
    138,739.70x = 14,374,433,085.36
  5. Step 5: Solve for x
    x = 14,374,433,085.36/138,739.70
  6. Step 6: Final answer
    x = 103,607.21

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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.