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Finding the Fourth Proportional to 66,921.30, 100,187.55 and 64,977.30

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Solution

The fourth proportional to 66,921.30, 100,187.55 and 64,977.30 is: 97,277.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,921.30 : 100,187.55 = 64,977.30 : x
  2. Step 2: Convert to fraction form
    66,921.30/100,187.55 = 64,977.30/x
  3. Step 3: Cross multiply
    66,921.30x = 100,187.55 × 64,977.30
  4. Step 4: Simplify right side
    66,921.30x = 6,509,916,492.62
  5. Step 5: Solve for x
    x = 6,509,916,492.62/66,921.30
  6. Step 6: Final answer
    x = 97,277.20

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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.