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Finding the Fourth Proportional to 343,871.65, 515,810.85 and 103,987.45

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Solution

The fourth proportional to 343,871.65, 515,810.85 and 103,987.45 is: 155,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,871.65 : 515,810.85 = 103,987.45 : x
  2. Step 2: Convert to fraction form
    343,871.65/515,810.85 = 103,987.45/x
  3. Step 3: Cross multiply
    343,871.65x = 515,810.85 × 103,987.45
  4. Step 4: Simplify right side
    343,871.65x = 53,637,854,973.83
  5. Step 5: Solve for x
    x = 53,637,854,973.83/343,871.65
  6. Step 6: Final answer
    x = 155,982.20

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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.