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Finding the Fourth Proportional to 86,992.06, 130,488.10 and 21,328.06

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Solution

The fourth proportional to 86,992.06, 130,488.10 and 21,328.06 is: 31,992.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,992.06 : 130,488.10 = 21,328.06 : x
  2. Step 2: Convert to fraction form
    86,992.06/130,488.10 = 21,328.06/x
  3. Step 3: Cross multiply
    86,992.06x = 130,488.10 × 21,328.06
  4. Step 4: Simplify right side
    86,992.06x = 2,783,058,026.09
  5. Step 5: Solve for x
    x = 2,783,058,026.09/86,992.06
  6. Step 6: Final answer
    x = 31,992.09

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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.