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Finding the Fourth Proportional to 189,139.88, 261,011.30 and 103,098.84

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Solution

The fourth proportional to 189,139.88, 261,011.30 and 103,098.84 is: 142,275.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,139.88 : 261,011.30 = 103,098.84 : x
  2. Step 2: Convert to fraction form
    189,139.88/261,011.30 = 103,098.84/x
  3. Step 3: Cross multiply
    189,139.88x = 261,011.30 × 103,098.84
  4. Step 4: Simplify right side
    189,139.88x = 26,909,962,256.89
  5. Step 5: Solve for x
    x = 26,909,962,256.89/189,139.88
  6. Step 6: Final answer
    x = 142,275.45

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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.