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Finding the Fourth Proportional to 61,728.16, 92,603.76 and 20,204.32

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Solution

The fourth proportional to 61,728.16, 92,603.76 and 20,204.32 is: 30,310.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,728.16 : 92,603.76 = 20,204.32 : x
  2. Step 2: Convert to fraction form
    61,728.16/92,603.76 = 20,204.32/x
  3. Step 3: Cross multiply
    61,728.16x = 92,603.76 × 20,204.32
  4. Step 4: Simplify right side
    61,728.16x = 1,870,996,000.24
  5. Step 5: Solve for x
    x = 1,870,996,000.24/61,728.16
  6. Step 6: Final answer
    x = 30,310.25

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1.5x scale

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.