Home / 78,395.10-108,230.12-51,615.45

Finding the Fourth Proportional to 78,395.10, 108,230.12 and 51,615.45

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Solution

The fourth proportional to 78,395.10, 108,230.12 and 51,615.45 is: 71,258.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,395.10 : 108,230.12 = 51,615.45 : x
  2. Step 2: Convert to fraction form
    78,395.10/108,230.12 = 51,615.45/x
  3. Step 3: Cross multiply
    78,395.10x = 108,230.12 × 51,615.45
  4. Step 4: Simplify right side
    78,395.10x = 5,586,346,347.35
  5. Step 5: Solve for x
    x = 5,586,346,347.35/78,395.10
  6. Step 6: Final answer
    x = 71,258.87

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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.