Home / 86,979.04-120,031.09-52,987.51

Finding the Fourth Proportional to 86,979.04, 120,031.09 and 52,987.51

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Solution

The fourth proportional to 86,979.04, 120,031.09 and 52,987.51 is: 73,122.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,979.04 : 120,031.09 = 52,987.51 : x
  2. Step 2: Convert to fraction form
    86,979.04/120,031.09 = 52,987.51/x
  3. Step 3: Cross multiply
    86,979.04x = 120,031.09 × 52,987.51
  4. Step 4: Simplify right side
    86,979.04x = 6,360,148,499.90
  5. Step 5: Solve for x
    x = 6,360,148,499.90/86,979.04
  6. Step 6: Final answer
    x = 73,122.78

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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.