Home / 78,455.19-108,267.85-42,645.09

Finding the Fourth Proportional to 78,455.19, 108,267.85 and 42,645.09

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Solution

The fourth proportional to 78,455.19, 108,267.85 and 42,645.09 is: 58,850.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,455.19 : 108,267.85 = 42,645.09 : x
  2. Step 2: Convert to fraction form
    78,455.19/108,267.85 = 42,645.09/x
  3. Step 3: Cross multiply
    78,455.19x = 108,267.85 × 42,645.09
  4. Step 4: Simplify right side
    78,455.19x = 4,617,092,207.36
  5. Step 5: Solve for x
    x = 4,617,092,207.36/78,455.19
  6. Step 6: Final answer
    x = 58,850.05

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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.