Home / 78,021.02-107,669.05-42,210.92

Finding the Fourth Proportional to 78,021.02, 107,669.05 and 42,210.92

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Solution

The fourth proportional to 78,021.02, 107,669.05 and 42,210.92 is: 58,251.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,021.02 : 107,669.05 = 42,210.92 : x
  2. Step 2: Convert to fraction form
    78,021.02/107,669.05 = 42,210.92/x
  3. Step 3: Cross multiply
    78,021.02x = 107,669.05 × 42,210.92
  4. Step 4: Simplify right side
    78,021.02x = 4,544,809,819.67
  5. Step 5: Solve for x
    x = 4,544,809,819.67/78,021.02
  6. Step 6: Final answer
    x = 58,251.09

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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.