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Finding the Fourth Proportional to 65,754.72, 90,681.90 and 56,230.32

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Solution

The fourth proportional to 65,754.72, 90,681.90 and 56,230.32 is: 77,546.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,754.72 : 90,681.90 = 56,230.32 : x
  2. Step 2: Convert to fraction form
    65,754.72/90,681.90 = 56,230.32/x
  3. Step 3: Cross multiply
    65,754.72x = 90,681.90 × 56,230.32
  4. Step 4: Simplify right side
    65,754.72x = 5,099,072,255.21
  5. Step 5: Solve for x
    x = 5,099,072,255.21/65,754.72
  6. Step 6: Final answer
    x = 77,546.86

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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.