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Finding the Fourth Proportional to 78,810.51, 108,774.70 and 48,188.84

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Solution

The fourth proportional to 78,810.51, 108,774.70 and 48,188.84 is: 66,510.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,810.51 : 108,774.70 = 48,188.84 : x
  2. Step 2: Convert to fraction form
    78,810.51/108,774.70 = 48,188.84/x
  3. Step 3: Cross multiply
    78,810.51x = 108,774.70 × 48,188.84
  4. Step 4: Simplify right side
    78,810.51x = 5,241,726,645.34
  5. Step 5: Solve for x
    x = 5,241,726,645.34/78,810.51
  6. Step 6: Final answer
    x = 66,510.50

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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.