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Finding the Fourth Proportional to 87,090.63, 130,543.45 and 55,401.00

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Solution

The fourth proportional to 87,090.63, 130,543.45 and 55,401.00 is: 83,042.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,090.63 : 130,543.45 = 55,401.00 : x
  2. Step 2: Convert to fraction form
    87,090.63/130,543.45 = 55,401.00/x
  3. Step 3: Cross multiply
    87,090.63x = 130,543.45 × 55,401.00
  4. Step 4: Simplify right side
    87,090.63x = 7,232,237,045.41
  5. Step 5: Solve for x
    x = 7,232,237,045.41/87,090.63
  6. Step 6: Final answer
    x = 83,042.66

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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.