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Finding the Fourth Proportional to 78,888.58, 108,862.16 and 43,071.68

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Solution

The fourth proportional to 78,888.58, 108,862.16 and 43,071.68 is: 59,436.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,888.58 : 108,862.16 = 43,071.68 : x
  2. Step 2: Convert to fraction form
    78,888.58/108,862.16 = 43,071.68/x
  3. Step 3: Cross multiply
    78,888.58x = 108,862.16 × 43,071.68
  4. Step 4: Simplify right side
    78,888.58x = 4,688,876,119.63
  5. Step 5: Solve for x
    x = 4,688,876,119.63/78,888.58
  6. Step 6: Final answer
    x = 59,436.69

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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.