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Finding the Fourth Proportional to 66,720.36, 99,408.88 and 65,758.08

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Solution

The fourth proportional to 66,720.36, 99,408.88 and 65,758.08 is: 97,975.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,720.36 : 99,408.88 = 65,758.08 : x
  2. Step 2: Convert to fraction form
    66,720.36/99,408.88 = 65,758.08/x
  3. Step 3: Cross multiply
    66,720.36x = 99,408.88 × 65,758.08
  4. Step 4: Simplify right side
    66,720.36x = 6,536,937,083.75
  5. Step 5: Solve for x
    x = 6,536,937,083.75/66,720.36
  6. Step 6: Final answer
    x = 97,975.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.