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Finding the Fourth Proportional to 138,775.52, 191,510.18 and 75,113.84

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Solution

The fourth proportional to 138,775.52, 191,510.18 and 75,113.84 is: 103,657.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,775.52 : 191,510.18 = 75,113.84 : x
  2. Step 2: Convert to fraction form
    138,775.52/191,510.18 = 75,113.84/x
  3. Step 3: Cross multiply
    138,775.52x = 191,510.18 × 75,113.84
  4. Step 4: Simplify right side
    138,775.52x = 14,385,065,018.89
  5. Step 5: Solve for x
    x = 14,385,065,018.89/138,775.52
  6. Step 6: Final answer
    x = 103,657.08

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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.