Home / 133,139.55-183,731.64-72,710.21

Finding the Fourth Proportional to 133,139.55, 183,731.64 and 72,710.21

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Solution

The fourth proportional to 133,139.55, 183,731.64 and 72,710.21 is: 100,339.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,139.55 : 183,731.64 = 72,710.21 : x
  2. Step 2: Convert to fraction form
    133,139.55/183,731.64 = 72,710.21/x
  3. Step 3: Cross multiply
    133,139.55x = 183,731.64 × 72,710.21
  4. Step 4: Simplify right side
    133,139.55x = 13,359,165,690.21
  5. Step 5: Solve for x
    x = 13,359,165,690.21/133,139.55
  6. Step 6: Final answer
    x = 100,339.58

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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.