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Finding the Fourth Proportional to 87,220.20, 130,830.30 and 28,060.20

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Solution

The fourth proportional to 87,220.20, 130,830.30 and 28,060.20 is: 42,090.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,220.20 : 130,830.30 = 28,060.20 : x
  2. Step 2: Convert to fraction form
    87,220.20/130,830.30 = 28,060.20/x
  3. Step 3: Cross multiply
    87,220.20x = 130,830.30 × 28,060.20
  4. Step 4: Simplify right side
    87,220.20x = 3,671,124,384.06
  5. Step 5: Solve for x
    x = 3,671,124,384.06/87,220.20
  6. Step 6: Final answer
    x = 42,090.30

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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.