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Finding the Fourth Proportional to 78,457.38, 108,286.92 and 46,620.14

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Solution

The fourth proportional to 78,457.38, 108,286.92 and 46,620.14 is: 64,345.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,457.38 : 108,286.92 = 46,620.14 : x
  2. Step 2: Convert to fraction form
    78,457.38/108,286.92 = 46,620.14/x
  3. Step 3: Cross multiply
    78,457.38x = 108,286.92 × 46,620.14
  4. Step 4: Simplify right side
    78,457.38x = 5,048,350,829.13
  5. Step 5: Solve for x
    x = 5,048,350,829.13/78,457.38
  6. Step 6: Final answer
    x = 64,345.14

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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.