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Finding the Fourth Proportional to 48,605.40, 72,762.30 and 45,721.80

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Solution

The fourth proportional to 48,605.40, 72,762.30 and 45,721.80 is: 68,445.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,605.40 : 72,762.30 = 45,721.80 : x
  2. Step 2: Convert to fraction form
    48,605.40/72,762.30 = 45,721.80/x
  3. Step 3: Cross multiply
    48,605.40x = 72,762.30 × 45,721.80
  4. Step 4: Simplify right side
    48,605.40x = 3,326,823,328.14
  5. Step 5: Solve for x
    x = 3,326,823,328.14/48,605.40
  6. Step 6: Final answer
    x = 68,445.55

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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.