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Finding the Fourth Proportional to 92,909.90, 128,254.92 and 62,736.08

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Solution

The fourth proportional to 92,909.90, 128,254.92 and 62,736.08 is: 86,602.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,909.90 : 128,254.92 = 62,736.08 : x
  2. Step 2: Convert to fraction form
    92,909.90/128,254.92 = 62,736.08/x
  3. Step 3: Cross multiply
    92,909.90x = 128,254.92 × 62,736.08
  4. Step 4: Simplify right side
    92,909.90x = 8,046,210,921.51
  5. Step 5: Solve for x
    x = 8,046,210,921.51/92,909.90
  6. Step 6: Final answer
    x = 86,602.30

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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.