Home / 78,798.78-108,740.40-42,989.04

Finding the Fourth Proportional to 78,798.78, 108,740.40 and 42,989.04

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Solution

The fourth proportional to 78,798.78, 108,740.40 and 42,989.04 is: 59,323.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,798.78 : 108,740.40 = 42,989.04 : x
  2. Step 2: Convert to fraction form
    78,798.78/108,740.40 = 42,989.04/x
  3. Step 3: Cross multiply
    78,798.78x = 108,740.40 × 42,989.04
  4. Step 4: Simplify right side
    78,798.78x = 4,674,645,405.22
  5. Step 5: Solve for x
    x = 4,674,645,405.22/78,798.78
  6. Step 6: Final answer
    x = 59,323.83

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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.