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Finding the Fourth Proportional to 138,774.93, 191,510.81 and 75,114.09

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Solution

The fourth proportional to 138,774.93, 191,510.81 and 75,114.09 is: 103,658.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,774.93 : 191,510.81 = 75,114.09 : x
  2. Step 2: Convert to fraction form
    138,774.93/191,510.81 = 75,114.09/x
  3. Step 3: Cross multiply
    138,774.93x = 191,510.81 × 75,114.09
  4. Step 4: Simplify right side
    138,774.93x = 14,385,159,842.74
  5. Step 5: Solve for x
    x = 14,385,159,842.74/138,774.93
  6. Step 6: Final answer
    x = 103,658.20

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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.