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Finding the Fourth Proportional to 154,331.34, 212,905.29 and 99,901.08

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Solution

The fourth proportional to 154,331.34, 212,905.29 and 99,901.08 is: 137,816.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,331.34 : 212,905.29 = 99,901.08 : x
  2. Step 2: Convert to fraction form
    154,331.34/212,905.29 = 99,901.08/x
  3. Step 3: Cross multiply
    154,331.34x = 212,905.29 × 99,901.08
  4. Step 4: Simplify right side
    154,331.34x = 21,269,468,408.71
  5. Step 5: Solve for x
    x = 21,269,468,408.71/154,331.34
  6. Step 6: Final answer
    x = 137,816.91

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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.