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Finding the Fourth Proportional to 138,637.76, 191,320.11 and 74,975.54

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Solution

The fourth proportional to 138,637.76, 191,320.11 and 74,975.54 is: 103,466.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,637.76 : 191,320.11 = 74,975.54 : x
  2. Step 2: Convert to fraction form
    138,637.76/191,320.11 = 74,975.54/x
  3. Step 3: Cross multiply
    138,637.76x = 191,320.11 × 74,975.54
  4. Step 4: Simplify right side
    138,637.76x = 14,344,327,603.51
  5. Step 5: Solve for x
    x = 14,344,327,603.51/138,637.76
  6. Step 6: Final answer
    x = 103,466.24

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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.