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Finding the Fourth Proportional to 92,781.84, 128,041.90 and 50,341.88

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Solution

The fourth proportional to 92,781.84, 128,041.90 and 50,341.88 is: 69,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,781.84 : 128,041.90 = 50,341.88 : x
  2. Step 2: Convert to fraction form
    92,781.84/128,041.90 = 50,341.88/x
  3. Step 3: Cross multiply
    92,781.84x = 128,041.90 × 50,341.88
  4. Step 4: Simplify right side
    92,781.84x = 6,445,869,964.77
  5. Step 5: Solve for x
    x = 6,445,869,964.77/92,781.84
  6. Step 6: Final answer
    x = 69,473.40

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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.