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Finding the Fourth Proportional to 48,661.60, 72,992.40 and 42,246.40

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Solution

The fourth proportional to 48,661.60, 72,992.40 and 42,246.40 is: 63,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,661.60 : 72,992.40 = 42,246.40 : x
  2. Step 2: Convert to fraction form
    48,661.60/72,992.40 = 42,246.40/x
  3. Step 3: Cross multiply
    48,661.60x = 72,992.40 × 42,246.40
  4. Step 4: Simplify right side
    48,661.60x = 3,083,666,127.36
  5. Step 5: Solve for x
    x = 3,083,666,127.36/48,661.60
  6. Step 6: Final answer
    x = 63,369.60

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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.