Home / 99,428.02-137,216.58-56,989.30

Finding the Fourth Proportional to 99,428.02, 137,216.58 and 56,989.30

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Solution

The fourth proportional to 99,428.02, 137,216.58 and 56,989.30 is: 78,648.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.02 : 137,216.58 = 56,989.30 : x
  2. Step 2: Convert to fraction form
    99,428.02/137,216.58 = 56,989.30/x
  3. Step 3: Cross multiply
    99,428.02x = 137,216.58 × 56,989.30
  4. Step 4: Simplify right side
    99,428.02x = 7,819,876,842.59
  5. Step 5: Solve for x
    x = 7,819,876,842.59/99,428.02
  6. Step 6: Final answer
    x = 78,648.62

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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.