Home / 78,665.66-108,558.08-42,855.70

Finding the Fourth Proportional to 78,665.66, 108,558.08 and 42,855.70

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Solution

The fourth proportional to 78,665.66, 108,558.08 and 42,855.70 is: 59,140.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,665.66 : 108,558.08 = 42,855.70 : x
  2. Step 2: Convert to fraction form
    78,665.66/108,558.08 = 42,855.70/x
  3. Step 3: Cross multiply
    78,665.66x = 108,558.08 × 42,855.70
  4. Step 4: Simplify right side
    78,665.66x = 4,652,331,751.99
  5. Step 5: Solve for x
    x = 4,652,331,751.99/78,665.66
  6. Step 6: Final answer
    x = 59,140.57

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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.