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Finding the Fourth Proportional to 86,649.80, 130,023.30 and 36,721.40

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Solution

The fourth proportional to 86,649.80, 130,023.30 and 36,721.40 is: 55,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,649.80 : 130,023.30 = 36,721.40 : x
  2. Step 2: Convert to fraction form
    86,649.80/130,023.30 = 36,721.40/x
  3. Step 3: Cross multiply
    86,649.80x = 130,023.30 × 36,721.40
  4. Step 4: Simplify right side
    86,649.80x = 4,774,637,608.62
  5. Step 5: Solve for x
    x = 4,774,637,608.62/86,649.80
  6. Step 6: Final answer
    x = 55,102.70

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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.