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Finding the Fourth Proportional to 66,881.84, 92,264.28 and 56,267.60

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Solution

The fourth proportional to 66,881.84, 92,264.28 and 56,267.60 is: 77,621.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,881.84 : 92,264.28 = 56,267.60 : x
  2. Step 2: Convert to fraction form
    66,881.84/92,264.28 = 56,267.60/x
  3. Step 3: Cross multiply
    66,881.84x = 92,264.28 × 56,267.60
  4. Step 4: Simplify right side
    66,881.84x = 5,191,489,601.33
  5. Step 5: Solve for x
    x = 5,191,489,601.33/66,881.84
  6. Step 6: Final answer
    x = 77,621.81

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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.