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Finding the Fourth Proportional to 163,312.97, 225,364.28 and 90,720.56

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Solution

The fourth proportional to 163,312.97, 225,364.28 and 90,720.56 is: 125,190.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,312.97 : 225,364.28 = 90,720.56 : x
  2. Step 2: Convert to fraction form
    163,312.97/225,364.28 = 90,720.56/x
  3. Step 3: Cross multiply
    163,312.97x = 225,364.28 × 90,720.56
  4. Step 4: Simplify right side
    163,312.97x = 20,445,174,022.21
  5. Step 5: Solve for x
    x = 20,445,174,022.21/163,312.97
  6. Step 6: Final answer
    x = 125,190.15

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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.