Home / 81,385.02-121,929.90-60,090.47

Finding the Fourth Proportional to 81,385.02, 121,929.90 and 60,090.47

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Solution

The fourth proportional to 81,385.02, 121,929.90 and 60,090.47 is: 90,026.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,385.02 : 121,929.90 = 60,090.47 : x
  2. Step 2: Convert to fraction form
    81,385.02/121,929.90 = 60,090.47/x
  3. Step 3: Cross multiply
    81,385.02x = 121,929.90 × 60,090.47
  4. Step 4: Simplify right side
    81,385.02x = 7,326,824,998.05
  5. Step 5: Solve for x
    x = 7,326,824,998.05/81,385.02
  6. Step 6: Final answer
    x = 90,026.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.