Home / 81,070.68-121,522.86-31,137.30

Finding the Fourth Proportional to 81,070.68, 121,522.86 and 31,137.30

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Solution

The fourth proportional to 81,070.68, 121,522.86 and 31,137.30 is: 46,674.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,070.68 : 121,522.86 = 31,137.30 : x
  2. Step 2: Convert to fraction form
    81,070.68/121,522.86 = 31,137.30/x
  3. Step 3: Cross multiply
    81,070.68x = 121,522.86 × 31,137.30
  4. Step 4: Simplify right side
    81,070.68x = 3,783,893,748.68
  5. Step 5: Solve for x
    x = 3,783,893,748.68/81,070.68
  6. Step 6: Final answer
    x = 46,674.01

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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.