Home / 81,800.08-122,681.88-31,881.52

Finding the Fourth Proportional to 81,800.08, 122,681.88 and 31,881.52

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Solution

The fourth proportional to 81,800.08, 122,681.88 and 31,881.52 is: 47,815.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,800.08 : 122,681.88 = 31,881.52 : x
  2. Step 2: Convert to fraction form
    81,800.08/122,681.88 = 31,881.52/x
  3. Step 3: Cross multiply
    81,800.08x = 122,681.88 × 31,881.52
  4. Step 4: Simplify right side
    81,800.08x = 3,911,284,810.86
  5. Step 5: Solve for x
    x = 3,911,284,810.86/81,800.08
  6. Step 6: Final answer
    x = 47,815.17

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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.