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Finding the Fourth Proportional to 101,426.60, 139,921.58 and 65,628.18

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Solution

The fourth proportional to 101,426.60, 139,921.58 and 65,628.18 is: 90,536.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,426.60 : 139,921.58 = 65,628.18 : x
  2. Step 2: Convert to fraction form
    101,426.60/139,921.58 = 65,628.18/x
  3. Step 3: Cross multiply
    101,426.60x = 139,921.58 × 65,628.18
  4. Step 4: Simplify right side
    101,426.60x = 9,182,798,309.98
  5. Step 5: Solve for x
    x = 9,182,798,309.98/101,426.60
  6. Step 6: Final answer
    x = 90,536.40

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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.