Home / 78,715.14-108,626.31-42,905.04

Finding the Fourth Proportional to 78,715.14, 108,626.31 and 42,905.04

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Solution

The fourth proportional to 78,715.14, 108,626.31 and 42,905.04 is: 59,208.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,715.14 : 108,626.31 = 42,905.04 : x
  2. Step 2: Convert to fraction form
    78,715.14/108,626.31 = 42,905.04/x
  3. Step 3: Cross multiply
    78,715.14x = 108,626.31 × 42,905.04
  4. Step 4: Simplify right side
    78,715.14x = 4,660,616,175.60
  5. Step 5: Solve for x
    x = 4,660,616,175.60/78,715.14
  6. Step 6: Final answer
    x = 59,208.64

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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.