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Finding the Fourth Proportional to 78,450.30, 108,262.08 and 42,640.32

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Solution

The fourth proportional to 78,450.30, 108,262.08 and 42,640.32 is: 58,844.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.30 : 108,262.08 = 42,640.32 : x
  2. Step 2: Convert to fraction form
    78,450.30/108,262.08 = 42,640.32/x
  3. Step 3: Cross multiply
    78,450.30x = 108,262.08 × 42,640.32
  4. Step 4: Simplify right side
    78,450.30x = 4,616,329,735.07
  5. Step 5: Solve for x
    x = 4,616,329,735.07/78,450.30
  6. Step 6: Final answer
    x = 58,844.00

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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.