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Finding the Fourth Proportional to 243,428.52, 365,162.04 and 85,692.36

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Solution

The fourth proportional to 243,428.52, 365,162.04 and 85,692.36 is: 128,545.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,428.52 : 365,162.04 = 85,692.36 : x
  2. Step 2: Convert to fraction form
    243,428.52/365,162.04 = 85,692.36/x
  3. Step 3: Cross multiply
    243,428.52x = 365,162.04 × 85,692.36
  4. Step 4: Simplify right side
    243,428.52x = 31,291,596,990.01
  5. Step 5: Solve for x
    x = 31,291,596,990.01/243,428.52
  6. Step 6: Final answer
    x = 128,545.32

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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.