Home / 86,790.48-130,184.76-21,126.48

Finding the Fourth Proportional to 86,790.48, 130,184.76 and 21,126.48

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Solution

The fourth proportional to 86,790.48, 130,184.76 and 21,126.48 is: 31,689.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,790.48 : 130,184.76 = 21,126.48 : x
  2. Step 2: Convert to fraction form
    86,790.48/130,184.76 = 21,126.48/x
  3. Step 3: Cross multiply
    86,790.48x = 130,184.76 × 21,126.48
  4. Step 4: Simplify right side
    86,790.48x = 2,750,345,728.44
  5. Step 5: Solve for x
    x = 2,750,345,728.44/86,790.48
  6. Step 6: Final answer
    x = 31,689.49

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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.