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Finding the Fourth Proportional to 107,901.40, 148,878.30 and 65,458.84

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Solution

The fourth proportional to 107,901.40, 148,878.30 and 65,458.84 is: 90,317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,901.40 : 148,878.30 = 65,458.84 : x
  2. Step 2: Convert to fraction form
    107,901.40/148,878.30 = 65,458.84/x
  3. Step 3: Cross multiply
    107,901.40x = 148,878.30 × 65,458.84
  4. Step 4: Simplify right side
    107,901.40x = 9,745,400,819.17
  5. Step 5: Solve for x
    x = 9,745,400,819.17/107,901.40
  6. Step 6: Final answer
    x = 90,317.65

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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.