Home / 102,639.92-141,635-57,314.36

Finding the Fourth Proportional to 102,639.92, 141,635 and 57,314.36

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Solution

The fourth proportional to 102,639.92, 141,635 and 57,314.36 is: 79,089.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,639.92 : 141,635 = 57,314.36 : x
  2. Step 2: Convert to fraction form
    102,639.92/141,635 = 57,314.36/x
  3. Step 3: Cross multiply
    102,639.92x = 141,635 × 57,314.36
  4. Step 4: Simplify right side
    102,639.92x = 8,117,719,378.60
  5. Step 5: Solve for x
    x = 8,117,719,378.60/102,639.92
  6. Step 6: Final answer
    x = 79,089.30

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1.5x scale

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.