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Finding the Fourth Proportional to 124,420.14, 171,721.08 and 86,235.12

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Solution

The fourth proportional to 124,420.14, 171,721.08 and 86,235.12 is: 119,019.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,420.14 : 171,721.08 = 86,235.12 : x
  2. Step 2: Convert to fraction form
    124,420.14/171,721.08 = 86,235.12/x
  3. Step 3: Cross multiply
    124,420.14x = 171,721.08 × 86,235.12
  4. Step 4: Simplify right side
    124,420.14x = 14,808,387,940.33
  5. Step 5: Solve for x
    x = 14,808,387,940.33/124,420.14
  6. Step 6: Final answer
    x = 119,019.22

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1.5x scale

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.