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Finding the Fourth Proportional to 66,875.84, 92,256 and 56,261.60

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Solution

The fourth proportional to 66,875.84, 92,256 and 56,261.60 is: 77,613.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,875.84 : 92,256 = 56,261.60 : x
  2. Step 2: Convert to fraction form
    66,875.84/92,256 = 56,261.60/x
  3. Step 3: Cross multiply
    66,875.84x = 92,256 × 56,261.60
  4. Step 4: Simplify right side
    66,875.84x = 5,190,470,169.60
  5. Step 5: Solve for x
    x = 5,190,470,169.60/66,875.84
  6. Step 6: Final answer
    x = 77,613.53

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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.