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Finding the Fourth Proportional to 124,638.40, 186,698.40 and 103,902.40

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Solution

The fourth proportional to 124,638.40, 186,698.40 and 103,902.40 is: 155,637.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,638.40 : 186,698.40 = 103,902.40 : x
  2. Step 2: Convert to fraction form
    124,638.40/186,698.40 = 103,902.40/x
  3. Step 3: Cross multiply
    124,638.40x = 186,698.40 × 103,902.40
  4. Step 4: Simplify right side
    124,638.40x = 19,398,411,836.16
  5. Step 5: Solve for x
    x = 19,398,411,836.16/124,638.40
  6. Step 6: Final answer
    x = 155,637.52

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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.