Home / 85,921.50-118,571.40-47,686.81

Finding the Fourth Proportional to 85,921.50, 118,571.40 and 47,686.81

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Solution

The fourth proportional to 85,921.50, 118,571.40 and 47,686.81 is: 65,807.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,921.50 : 118,571.40 = 47,686.81 : x
  2. Step 2: Convert to fraction form
    85,921.50/118,571.40 = 47,686.81/x
  3. Step 3: Cross multiply
    85,921.50x = 118,571.40 × 47,686.81
  4. Step 4: Simplify right side
    85,921.50x = 5,654,291,823.23
  5. Step 5: Solve for x
    x = 5,654,291,823.23/85,921.50
  6. Step 6: Final answer
    x = 65,807.65

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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.