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Finding the Fourth Proportional to 48,321, 66,683.10 and 28,191.72

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Solution

The fourth proportional to 48,321, 66,683.10 and 28,191.72 is: 38,904.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,321 : 66,683.10 = 28,191.72 : x
  2. Step 2: Convert to fraction form
    48,321/66,683.10 = 28,191.72/x
  3. Step 3: Cross multiply
    48,321x = 66,683.10 × 28,191.72
  4. Step 4: Simplify right side
    48,321x = 1,879,911,283.93
  5. Step 5: Solve for x
    x = 1,879,911,283.93/48,321
  6. Step 6: Final answer
    x = 38,904.64

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1.5x scale

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.