Home / 74,156.40-102,078.72-64,708.56

Finding the Fourth Proportional to 74,156.40, 102,078.72 and 64,708.56

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Solution

The fourth proportional to 74,156.40, 102,078.72 and 64,708.56 is: 89,073.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,156.40 : 102,078.72 = 64,708.56 : x
  2. Step 2: Convert to fraction form
    74,156.40/102,078.72 = 64,708.56/x
  3. Step 3: Cross multiply
    74,156.40x = 102,078.72 × 64,708.56
  4. Step 4: Simplify right side
    74,156.40x = 6,605,366,977.84
  5. Step 5: Solve for x
    x = 6,605,366,977.84/74,156.40
  6. Step 6: Final answer
    x = 89,073.46

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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.