Home / 85,211.16-127,875.06-45,780.36

Finding the Fourth Proportional to 85,211.16, 127,875.06 and 45,780.36

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Solution

The fourth proportional to 85,211.16, 127,875.06 and 45,780.36 is: 68,701.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,211.16 : 127,875.06 = 45,780.36 : x
  2. Step 2: Convert to fraction form
    85,211.16/127,875.06 = 45,780.36/x
  3. Step 3: Cross multiply
    85,211.16x = 127,875.06 × 45,780.36
  4. Step 4: Simplify right side
    85,211.16x = 5,854,166,281.82
  5. Step 5: Solve for x
    x = 5,854,166,281.82/85,211.16
  6. Step 6: Final answer
    x = 68,701.87

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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.