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Finding the Fourth Proportional to 101,643.32, 140,265.88 and 56,321.12

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Solution

The fourth proportional to 101,643.32, 140,265.88 and 56,321.12 is: 77,722.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,643.32 : 140,265.88 = 56,321.12 : x
  2. Step 2: Convert to fraction form
    101,643.32/140,265.88 = 56,321.12/x
  3. Step 3: Cross multiply
    101,643.32x = 140,265.88 × 56,321.12
  4. Step 4: Simplify right side
    101,643.32x = 7,899,931,459.39
  5. Step 5: Solve for x
    x = 7,899,931,459.39/101,643.32
  6. Step 6: Final answer
    x = 77,722.09

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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.