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Finding the Fourth Proportional to 84,739.34, 127,020.30 and 28,560.01

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Solution

The fourth proportional to 84,739.34, 127,020.30 and 28,560.01 is: 42,810.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,739.34 : 127,020.30 = 28,560.01 : x
  2. Step 2: Convert to fraction form
    84,739.34/127,020.30 = 28,560.01/x
  3. Step 3: Cross multiply
    84,739.34x = 127,020.30 × 28,560.01
  4. Step 4: Simplify right side
    84,739.34x = 3,627,701,038.20
  5. Step 5: Solve for x
    x = 3,627,701,038.20/84,739.34
  6. Step 6: Final answer
    x = 42,810.12

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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.