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Finding the Fourth Proportional to 230,935.80, 346,331.70 and 90,737.40

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Solution

The fourth proportional to 230,935.80, 346,331.70 and 90,737.40 is: 136,077.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,935.80 : 346,331.70 = 90,737.40 : x
  2. Step 2: Convert to fraction form
    230,935.80/346,331.70 = 90,737.40/x
  3. Step 3: Cross multiply
    230,935.80x = 346,331.70 × 90,737.40
  4. Step 4: Simplify right side
    230,935.80x = 31,425,237,995.58
  5. Step 5: Solve for x
    x = 31,425,237,995.58/230,935.80
  6. Step 6: Final answer
    x = 136,077.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.