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Finding the Fourth Proportional to 78,800.66, 108,741.12 and 42,988.54

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Solution

The fourth proportional to 78,800.66, 108,741.12 and 42,988.54 is: 59,322.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,800.66 : 108,741.12 = 42,988.54 : x
  2. Step 2: Convert to fraction form
    78,800.66/108,741.12 = 42,988.54/x
  3. Step 3: Cross multiply
    78,800.66x = 108,741.12 × 42,988.54
  4. Step 4: Simplify right side
    78,800.66x = 4,674,621,443.06
  5. Step 5: Solve for x
    x = 4,674,621,443.06/78,800.66
  6. Step 6: Final answer
    x = 59,322.11

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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.