Home / 78,395.18-108,185.70-42,585.80

Finding the Fourth Proportional to 78,395.18, 108,185.70 and 42,585.80

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Solution

The fourth proportional to 78,395.18, 108,185.70 and 42,585.80 is: 58,768.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,395.18 : 108,185.70 = 42,585.80 : x
  2. Step 2: Convert to fraction form
    78,395.18/108,185.70 = 42,585.80/x
  3. Step 3: Cross multiply
    78,395.18x = 108,185.70 × 42,585.80
  4. Step 4: Simplify right side
    78,395.18x = 4,607,174,583.06
  5. Step 5: Solve for x
    x = 4,607,174,583.06/78,395.18
  6. Step 6: Final answer
    x = 58,768.59

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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.