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Finding the Fourth Proportional to 101,156.92, 139,662.30 and 90,528.28

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Solution

The fourth proportional to 101,156.92, 139,662.30 and 90,528.28 is: 124,987.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,156.92 : 139,662.30 = 90,528.28 : x
  2. Step 2: Convert to fraction form
    101,156.92/139,662.30 = 90,528.28/x
  3. Step 3: Cross multiply
    101,156.92x = 139,662.30 × 90,528.28
  4. Step 4: Simplify right side
    101,156.92x = 12,643,387,799.84
  5. Step 5: Solve for x
    x = 12,643,387,799.84/101,156.92
  6. Step 6: Final answer
    x = 124,987.87

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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.