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Finding the Fourth Proportional to 101,210.28, 139,637.70 and 56,489.64

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Solution

The fourth proportional to 101,210.28, 139,637.70 and 56,489.64 is: 77,937.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,210.28 : 139,637.70 = 56,489.64 : x
  2. Step 2: Convert to fraction form
    101,210.28/139,637.70 = 56,489.64/x
  3. Step 3: Cross multiply
    101,210.28x = 139,637.70 × 56,489.64
  4. Step 4: Simplify right side
    101,210.28x = 7,888,083,403.43
  5. Step 5: Solve for x
    x = 7,888,083,403.43/101,210.28
  6. Step 6: Final answer
    x = 77,937.57

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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.