Home / 123,800.48-170,845.36-72,815.35

Finding the Fourth Proportional to 123,800.48, 170,845.36 and 72,815.35

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Solution

The fourth proportional to 123,800.48, 170,845.36 and 72,815.35 is: 100,485.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,800.48 : 170,845.36 = 72,815.35 : x
  2. Step 2: Convert to fraction form
    123,800.48/170,845.36 = 72,815.35/x
  3. Step 3: Cross multiply
    123,800.48x = 170,845.36 × 72,815.35
  4. Step 4: Simplify right side
    123,800.48x = 12,440,164,075.12
  5. Step 5: Solve for x
    x = 12,440,164,075.12/123,800.48
  6. Step 6: Final answer
    x = 100,485.59

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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.