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Finding the Fourth Proportional to 86,712.75, 130,069.13 and 21,048.75

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Solution

The fourth proportional to 86,712.75, 130,069.13 and 21,048.75 is: 31,573.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,712.75 : 130,069.13 = 21,048.75 : x
  2. Step 2: Convert to fraction form
    86,712.75/130,069.13 = 21,048.75/x
  3. Step 3: Cross multiply
    86,712.75x = 130,069.13 × 21,048.75
  4. Step 4: Simplify right side
    86,712.75x = 2,737,792,494.84
  5. Step 5: Solve for x
    x = 2,737,792,494.84/86,712.75
  6. Step 6: Final answer
    x = 31,573.13

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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.