Home / 90,904.64-136,419.17-31,740.30

Finding the Fourth Proportional to 90,904.64, 136,419.17 and 31,740.30

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Solution

The fourth proportional to 90,904.64, 136,419.17 and 31,740.30 is: 47,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,904.64 : 136,419.17 = 31,740.30 : x
  2. Step 2: Convert to fraction form
    90,904.64/136,419.17 = 31,740.30/x
  3. Step 3: Cross multiply
    90,904.64x = 136,419.17 × 31,740.30
  4. Step 4: Simplify right side
    90,904.64x = 4,329,985,222.85
  5. Step 5: Solve for x
    x = 4,329,985,222.85/90,904.64
  6. Step 6: Final answer
    x = 47,632.17

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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.