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Finding the Fourth Proportional to 92,967.50, 128,632.92 and 81,055.64

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Solution

The fourth proportional to 92,967.50, 128,632.92 and 81,055.64 is: 112,151.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,967.50 : 128,632.92 = 81,055.64 : x
  2. Step 2: Convert to fraction form
    92,967.50/128,632.92 = 81,055.64/x
  3. Step 3: Cross multiply
    92,967.50x = 128,632.92 × 81,055.64
  4. Step 4: Simplify right side
    92,967.50x = 10,426,423,655.67
  5. Step 5: Solve for x
    x = 10,426,423,655.67/92,967.50
  6. Step 6: Final answer
    x = 112,151.27

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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.