Home / 81,865.98-112,988.86-47,405.70

Finding the Fourth Proportional to 81,865.98, 112,988.86 and 47,405.70

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Solution

The fourth proportional to 81,865.98, 112,988.86 and 47,405.70 is: 65,427.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,865.98 : 112,988.86 = 47,405.70 : x
  2. Step 2: Convert to fraction form
    81,865.98/112,988.86 = 47,405.70/x
  3. Step 3: Cross multiply
    81,865.98x = 112,988.86 × 47,405.70
  4. Step 4: Simplify right side
    81,865.98x = 5,356,316,000.50
  5. Step 5: Solve for x
    x = 5,356,316,000.50/81,865.98
  6. Step 6: Final answer
    x = 65,427.86

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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.