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Finding the Fourth Proportional to 131,643.83, 197,428.05 and 42,905.09

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Solution

The fourth proportional to 131,643.83, 197,428.05 and 42,905.09 is: 64,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,643.83 : 197,428.05 = 42,905.09 : x
  2. Step 2: Convert to fraction form
    131,643.83/197,428.05 = 42,905.09/x
  3. Step 3: Cross multiply
    131,643.83x = 197,428.05 × 42,905.09
  4. Step 4: Simplify right side
    131,643.83x = 8,470,668,747.34
  5. Step 5: Solve for x
    x = 8,470,668,747.34/131,643.83
  6. Step 6: Final answer
    x = 64,345.35

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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.