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Finding the Fourth Proportional to 74,891.79, 103,307.81 and 53,386.29

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Solution

The fourth proportional to 74,891.79, 103,307.81 and 53,386.29 is: 73,642.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,891.79 : 103,307.81 = 53,386.29 : x
  2. Step 2: Convert to fraction form
    74,891.79/103,307.81 = 53,386.29/x
  3. Step 3: Cross multiply
    74,891.79x = 103,307.81 × 53,386.29
  4. Step 4: Simplify right side
    74,891.79x = 5,515,220,436.99
  5. Step 5: Solve for x
    x = 5,515,220,436.99/74,891.79
  6. Step 6: Final answer
    x = 73,642.52

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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.