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Finding the Fourth Proportional to 107,900.40, 148,876.92 and 65,457.84

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Solution

The fourth proportional to 107,900.40, 148,876.92 and 65,457.84 is: 90,316.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,900.40 : 148,876.92 = 65,457.84 : x
  2. Step 2: Convert to fraction form
    107,900.40/148,876.92 = 65,457.84/x
  3. Step 3: Cross multiply
    107,900.40x = 148,876.92 × 65,457.84
  4. Step 4: Simplify right side
    107,900.40x = 9,745,161,609.05
  5. Step 5: Solve for x
    x = 9,745,161,609.05/107,900.40
  6. Step 6: Final answer
    x = 90,316.27

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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.