Home / 78,780.08-108,717.40-42,969.84

Finding the Fourth Proportional to 78,780.08, 108,717.40 and 42,969.84

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Solution

The fourth proportional to 78,780.08, 108,717.40 and 42,969.84 is: 59,298.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,780.08 : 108,717.40 = 42,969.84 : x
  2. Step 2: Convert to fraction form
    78,780.08/108,717.40 = 42,969.84/x
  3. Step 3: Cross multiply
    78,780.08x = 108,717.40 × 42,969.84
  4. Step 4: Simplify right side
    78,780.08x = 4,671,569,283.22
  5. Step 5: Solve for x
    x = 4,671,569,283.22/78,780.08
  6. Step 6: Final answer
    x = 59,298.86

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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.