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Finding the Fourth Proportional to 86,585.44, 129,878.94 and 27,421.40

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Solution

The fourth proportional to 86,585.44, 129,878.94 and 27,421.40 is: 41,132.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,585.44 : 129,878.94 = 27,421.40 : x
  2. Step 2: Convert to fraction form
    86,585.44/129,878.94 = 27,421.40/x
  3. Step 3: Cross multiply
    86,585.44x = 129,878.94 × 27,421.40
  4. Step 4: Simplify right side
    86,585.44x = 3,561,462,365.32
  5. Step 5: Solve for x
    x = 3,561,462,365.32/86,585.44
  6. Step 6: Final answer
    x = 41,132.35

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1.5x scale

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.