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Finding the Fourth Proportional to 92,866.48, 128,260.20 and 62,776

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Solution

The fourth proportional to 92,866.48, 128,260.20 and 62,776 is: 86,701.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,866.48 : 128,260.20 = 62,776 : x
  2. Step 2: Convert to fraction form
    92,866.48/128,260.20 = 62,776/x
  3. Step 3: Cross multiply
    92,866.48x = 128,260.20 × 62,776
  4. Step 4: Simplify right side
    92,866.48x = 8,051,662,315.20
  5. Step 5: Solve for x
    x = 8,051,662,315.20/92,866.48
  6. Step 6: Final answer
    x = 86,701.49

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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.