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Finding the Fourth Proportional to 86,623.81, 129,978.81 and 48,649.53

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Solution

The fourth proportional to 86,623.81, 129,978.81 and 48,649.53 is: 72,998.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,623.81 : 129,978.81 = 48,649.53 : x
  2. Step 2: Convert to fraction form
    86,623.81/129,978.81 = 48,649.53/x
  3. Step 3: Cross multiply
    86,623.81x = 129,978.81 × 48,649.53
  4. Step 4: Simplify right side
    86,623.81x = 6,323,408,016.46
  5. Step 5: Solve for x
    x = 6,323,408,016.46/86,623.81
  6. Step 6: Final answer
    x = 72,998.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.