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Finding the Fourth Proportional to 138,737.70, 191,458.53 and 75,075.49

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Solution

The fourth proportional to 138,737.70, 191,458.53 and 75,075.49 is: 103,604.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,737.70 : 191,458.53 = 75,075.49 : x
  2. Step 2: Convert to fraction form
    138,737.70/191,458.53 = 75,075.49/x
  3. Step 3: Cross multiply
    138,737.70x = 191,458.53 × 75,075.49
  4. Step 4: Simplify right side
    138,737.70x = 14,373,842,954.43
  5. Step 5: Solve for x
    x = 14,373,842,954.43/138,737.70
  6. Step 6: Final answer
    x = 103,604.45

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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.