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Finding the Fourth Proportional to 81,681.58, 112,720.59 and 45,871.62

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Solution

The fourth proportional to 81,681.58, 112,720.59 and 45,871.62 is: 63,302.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,681.58 : 112,720.59 = 45,871.62 : x
  2. Step 2: Convert to fraction form
    81,681.58/112,720.59 = 45,871.62/x
  3. Step 3: Cross multiply
    81,681.58x = 112,720.59 × 45,871.62
  4. Step 4: Simplify right side
    81,681.58x = 5,170,676,070.66
  5. Step 5: Solve for x
    x = 5,170,676,070.66/81,681.58
  6. Step 6: Final answer
    x = 63,302.84

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1.5x scale

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.