Home / 78,531,174.97-117,643,516.65-61,178,123.19

Finding the Fourth Proportional to 78,531,174.97, 117,643,516.65 and 61,178,123.19

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Solution

The fourth proportional to 78,531,174.97, 117,643,516.65 and 61,178,123.19 is: 91,647,801.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,531,174.97 : 117,643,516.65 = 61,178,123.19 : x
  2. Step 2: Convert to fraction form
    78,531,174.97/117,643,516.65 = 61,178,123.19/x
  3. Step 3: Cross multiply
    78,531,174.97x = 117,643,516.65 × 61,178,123.19
  4. Step 4: Simplify right side
    78,531,174.97x = 7,197,209,554,118,516
  5. Step 5: Solve for x
    x = 7,197,209,554,118,516/78,531,174.97
  6. Step 6: Final answer
    x = 91,647,801.74

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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.