Home / 100,328.64-138,455.08-55,010.76

Finding the Fourth Proportional to 100,328.64, 138,455.08 and 55,010.76

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Solution

The fourth proportional to 100,328.64, 138,455.08 and 55,010.76 is: 75,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,328.64 : 138,455.08 = 55,010.76 : x
  2. Step 2: Convert to fraction form
    100,328.64/138,455.08 = 55,010.76/x
  3. Step 3: Cross multiply
    100,328.64x = 138,455.08 × 55,010.76
  4. Step 4: Simplify right side
    100,328.64x = 7,616,519,176.66
  5. Step 5: Solve for x
    x = 7,616,519,176.66/100,328.64
  6. Step 6: Final answer
    x = 75,915.70

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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.