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Finding the Fourth Proportional to 101,156.68, 139,661.96 and 90,528.04

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Solution

The fourth proportional to 101,156.68, 139,661.96 and 90,528.04 is: 124,987.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,156.68 : 139,661.96 = 90,528.04 : x
  2. Step 2: Convert to fraction form
    101,156.68/139,661.96 = 90,528.04/x
  3. Step 3: Cross multiply
    101,156.68x = 139,661.96 × 90,528.04
  4. Step 4: Simplify right side
    101,156.68x = 12,643,323,501.36
  5. Step 5: Solve for x
    x = 12,643,323,501.36/101,156.68
  6. Step 6: Final answer
    x = 124,987.53

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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.