Home / 154,190.18-212,818.01-100,381.50

Finding the Fourth Proportional to 154,190.18, 212,818.01 and 100,381.50

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Solution

The fourth proportional to 154,190.18, 212,818.01 and 100,381.50 is: 138,549.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,190.18 : 212,818.01 = 100,381.50 : x
  2. Step 2: Convert to fraction form
    154,190.18/212,818.01 = 100,381.50/x
  3. Step 3: Cross multiply
    154,190.18x = 212,818.01 × 100,381.50
  4. Step 4: Simplify right side
    154,190.18x = 21,362,991,070.82
  5. Step 5: Solve for x
    x = 21,362,991,070.82/154,190.18
  6. Step 6: Final answer
    x = 138,549.62

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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.