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Finding the Fourth Proportional to 423,653.79, 635,485.91 and 124,140.50

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Solution

The fourth proportional to 423,653.79, 635,485.91 and 124,140.50 is: 186,212.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,653.79 : 635,485.91 = 124,140.50 : x
  2. Step 2: Convert to fraction form
    423,653.79/635,485.91 = 124,140.50/x
  3. Step 3: Cross multiply
    423,653.79x = 635,485.91 × 124,140.50
  4. Step 4: Simplify right side
    423,653.79x = 78,889,537,195.30
  5. Step 5: Solve for x
    x = 78,889,537,195.30/423,653.79
  6. Step 6: Final answer
    x = 186,212.28

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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.