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Finding the Fourth Proportional to 107,385.40, 148,182.78 and 64,941.40

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Solution

The fourth proportional to 107,385.40, 148,182.78 and 64,941.40 is: 89,613.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,385.40 : 148,182.78 = 64,941.40 : x
  2. Step 2: Convert to fraction form
    107,385.40/148,182.78 = 64,941.40/x
  3. Step 3: Cross multiply
    107,385.40x = 148,182.78 × 64,941.40
  4. Step 4: Simplify right side
    107,385.40x = 9,623,197,189.09
  5. Step 5: Solve for x
    x = 9,623,197,189.09/107,385.40
  6. Step 6: Final answer
    x = 89,613.65

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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.