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Finding the Fourth Proportional to 92,420.64, 127,539.84 and 49,978.56

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Solution

The fourth proportional to 92,420.64, 127,539.84 and 49,978.56 is: 68,970.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,420.64 : 127,539.84 = 49,978.56 : x
  2. Step 2: Convert to fraction form
    92,420.64/127,539.84 = 49,978.56/x
  3. Step 3: Cross multiply
    92,420.64x = 127,539.84 × 49,978.56
  4. Step 4: Simplify right side
    92,420.64x = 6,374,257,545.83
  5. Step 5: Solve for x
    x = 6,374,257,545.83/92,420.64
  6. Step 6: Final answer
    x = 68,970.06

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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.