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Finding the Fourth Proportional to 63,480, 87,602.40 and 35,190

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Solution

The fourth proportional to 63,480, 87,602.40 and 35,190 is: 48,562.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,480 : 87,602.40 = 35,190 : x
  2. Step 2: Convert to fraction form
    63,480/87,602.40 = 35,190/x
  3. Step 3: Cross multiply
    63,480x = 87,602.40 × 35,190
  4. Step 4: Simplify right side
    63,480x = 3,082,728,456
  5. Step 5: Solve for x
    x = 3,082,728,456/63,480
  6. Step 6: Final answer
    x = 48,562.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.