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Finding the Fourth Proportional to 67,678.16, 93,405.84 and 38,992.28

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Solution

The fourth proportional to 67,678.16, 93,405.84 and 38,992.28 is: 53,815.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,678.16 : 93,405.84 = 38,992.28 : x
  2. Step 2: Convert to fraction form
    67,678.16/93,405.84 = 38,992.28/x
  3. Step 3: Cross multiply
    67,678.16x = 93,405.84 × 38,992.28
  4. Step 4: Simplify right side
    67,678.16x = 3,642,106,666.92
  5. Step 5: Solve for x
    x = 3,642,106,666.92/67,678.16
  6. Step 6: Final answer
    x = 53,815.10

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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.