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Finding the Fourth Proportional to 78,551.74, 117,827.61 and 64,671.58

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Solution

The fourth proportional to 78,551.74, 117,827.61 and 64,671.58 is: 97,007.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,551.74 : 117,827.61 = 64,671.58 : x
  2. Step 2: Convert to fraction form
    78,551.74/117,827.61 = 64,671.58/x
  3. Step 3: Cross multiply
    78,551.74x = 117,827.61 × 64,671.58
  4. Step 4: Simplify right side
    78,551.74x = 7,620,097,706.32
  5. Step 5: Solve for x
    x = 7,620,097,706.32/78,551.74
  6. Step 6: Final answer
    x = 97,007.37

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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.