Home / 78,450.67-108,263.03-42,640.68

Finding the Fourth Proportional to 78,450.67, 108,263.03 and 42,640.68

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Solution

The fourth proportional to 78,450.67, 108,263.03 and 42,640.68 is: 58,844.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.67 : 108,263.03 = 42,640.68 : x
  2. Step 2: Convert to fraction form
    78,450.67/108,263.03 = 42,640.68/x
  3. Step 3: Cross multiply
    78,450.67x = 108,263.03 × 42,640.68
  4. Step 4: Simplify right side
    78,450.67x = 4,616,409,004.86
  5. Step 5: Solve for x
    x = 4,616,409,004.86/78,450.67
  6. Step 6: Final answer
    x = 58,844.74

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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.