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Finding the Fourth Proportional to 66,825.72, 92,009.10 and 56,734.20

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Solution

The fourth proportional to 66,825.72, 92,009.10 and 56,734.20 is: 78,114.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,825.72 : 92,009.10 = 56,734.20 : x
  2. Step 2: Convert to fraction form
    66,825.72/92,009.10 = 56,734.20/x
  3. Step 3: Cross multiply
    66,825.72x = 92,009.10 × 56,734.20
  4. Step 4: Simplify right side
    66,825.72x = 5,220,062,681.22
  5. Step 5: Solve for x
    x = 5,220,062,681.22/66,825.72
  6. Step 6: Final answer
    x = 78,114.57

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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.