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Finding the Fourth Proportional to 66,455.60, 91,706.15 and 37,779.02

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Solution

The fourth proportional to 66,455.60, 91,706.15 and 37,779.02 is: 52,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,455.60 : 91,706.15 = 37,779.02 : x
  2. Step 2: Convert to fraction form
    66,455.60/91,706.15 = 37,779.02/x
  3. Step 3: Cross multiply
    66,455.60x = 91,706.15 × 37,779.02
  4. Step 4: Simplify right side
    66,455.60x = 3,464,567,827.55
  5. Step 5: Solve for x
    x = 3,464,567,827.55/66,455.60
  6. Step 6: Final answer
    x = 52,133.58

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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.