Home / 81,681.45-112,720.08-45,871.35

Finding the Fourth Proportional to 81,681.45, 112,720.08 and 45,871.35

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Solution

The fourth proportional to 81,681.45, 112,720.08 and 45,871.35 is: 63,302.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,681.45 : 112,720.08 = 45,871.35 : x
  2. Step 2: Convert to fraction form
    81,681.45/112,720.08 = 45,871.35/x
  3. Step 3: Cross multiply
    81,681.45x = 112,720.08 × 45,871.35
  4. Step 4: Simplify right side
    81,681.45x = 5,170,622,241.71
  5. Step 5: Solve for x
    x = 5,170,622,241.71/81,681.45
  6. Step 6: Final answer
    x = 63,302.28

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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.