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Finding the Fourth Proportional to 48,320, 66,681.72 and 28,190.72

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Solution

The fourth proportional to 48,320, 66,681.72 and 28,190.72 is: 38,903.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,320 : 66,681.72 = 28,190.72 : x
  2. Step 2: Convert to fraction form
    48,320/66,681.72 = 28,190.72/x
  3. Step 3: Cross multiply
    48,320x = 66,681.72 × 28,190.72
  4. Step 4: Simplify right side
    48,320x = 1,879,805,697.64
  5. Step 5: Solve for x
    x = 1,879,805,697.64/48,320
  6. Step 6: Final answer
    x = 38,903.26

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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.