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Finding the Fourth Proportional to 105,554.61, 145,665.30 and 57,807.54

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Solution

The fourth proportional to 105,554.61, 145,665.30 and 57,807.54 is: 79,774.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,554.61 : 145,665.30 = 57,807.54 : x
  2. Step 2: Convert to fraction form
    105,554.61/145,665.30 = 57,807.54/x
  3. Step 3: Cross multiply
    105,554.61x = 145,665.30 × 57,807.54
  4. Step 4: Simplify right side
    105,554.61x = 8,420,552,656.36
  5. Step 5: Solve for x
    x = 8,420,552,656.36/105,554.61
  6. Step 6: Final answer
    x = 79,774.37

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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.