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Finding the Fourth Proportional to 48,718.40, 72,931.80 and 45,834.80

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Solution

The fourth proportional to 48,718.40, 72,931.80 and 45,834.80 is: 68,615.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,718.40 : 72,931.80 = 45,834.80 : x
  2. Step 2: Convert to fraction form
    48,718.40/72,931.80 = 45,834.80/x
  3. Step 3: Cross multiply
    48,718.40x = 72,931.80 × 45,834.80
  4. Step 4: Simplify right side
    48,718.40x = 3,342,814,466.64
  5. Step 5: Solve for x
    x = 3,342,814,466.64/48,718.40
  6. Step 6: Final answer
    x = 68,615.03

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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.