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Finding the Fourth Proportional to 74,580.71, 102,721.77 and 64,509.57

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Solution

The fourth proportional to 74,580.71, 102,721.77 and 64,509.57 is: 88,850.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,580.71 : 102,721.77 = 64,509.57 : x
  2. Step 2: Convert to fraction form
    74,580.71/102,721.77 = 64,509.57/x
  3. Step 3: Cross multiply
    74,580.71x = 102,721.77 × 64,509.57
  4. Step 4: Simplify right side
    74,580.71x = 6,626,537,212.34
  5. Step 5: Solve for x
    x = 6,626,537,212.34/74,580.71
  6. Step 6: Final answer
    x = 88,850.56

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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.