Home / 78,390.02-108,180.24-42,582.08

Finding the Fourth Proportional to 78,390.02, 108,180.24 and 42,582.08

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Solution

The fourth proportional to 78,390.02, 108,180.24 and 42,582.08 is: 58,764.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,390.02 : 108,180.24 = 42,582.08 : x
  2. Step 2: Convert to fraction form
    78,390.02/108,180.24 = 42,582.08/x
  3. Step 3: Cross multiply
    78,390.02x = 108,180.24 × 42,582.08
  4. Step 4: Simplify right side
    78,390.02x = 4,606,539,634.10
  5. Step 5: Solve for x
    x = 4,606,539,634.10/78,390.02
  6. Step 6: Final answer
    x = 58,764.36

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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.