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Finding the Fourth Proportional to 103,707.65, 143,079.13 and 67,918.07

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Solution

The fourth proportional to 103,707.65, 143,079.13 and 67,918.07 is: 93,702.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,707.65 : 143,079.13 = 67,918.07 : x
  2. Step 2: Convert to fraction form
    103,707.65/143,079.13 = 67,918.07/x
  3. Step 3: Cross multiply
    103,707.65x = 143,079.13 × 67,918.07
  4. Step 4: Simplify right side
    103,707.65x = 9,717,658,366.88
  5. Step 5: Solve for x
    x = 9,717,658,366.88/103,707.65
  6. Step 6: Final answer
    x = 93,702.43

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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.