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Finding the Fourth Proportional to 92,992.96, 128,344.32 and 56,715.46

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Solution

The fourth proportional to 92,992.96, 128,344.32 and 56,715.46 is: 78,275.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,992.96 : 128,344.32 = 56,715.46 : x
  2. Step 2: Convert to fraction form
    92,992.96/128,344.32 = 56,715.46/x
  3. Step 3: Cross multiply
    92,992.96x = 128,344.32 × 56,715.46
  4. Step 4: Simplify right side
    92,992.96x = 7,279,107,147.19
  5. Step 5: Solve for x
    x = 7,279,107,147.19/92,992.96
  6. Step 6: Final answer
    x = 78,275.89

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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.