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Finding the Fourth Proportional to 105,424.52, 145,485.74 and 57,677.90

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Solution

The fourth proportional to 105,424.52, 145,485.74 and 57,677.90 is: 79,595.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,424.52 : 145,485.74 = 57,677.90 : x
  2. Step 2: Convert to fraction form
    105,424.52/145,485.74 = 57,677.90/x
  3. Step 3: Cross multiply
    105,424.52x = 145,485.74 × 57,677.90
  4. Step 4: Simplify right side
    105,424.52x = 8,391,311,963.15
  5. Step 5: Solve for x
    x = 8,391,311,963.15/105,424.52
  6. Step 6: Final answer
    x = 79,595.45

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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.