Home / 78,017.13-107,663.54-42,207.03

Finding the Fourth Proportional to 78,017.13, 107,663.54 and 42,207.03

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Solution

The fourth proportional to 78,017.13, 107,663.54 and 42,207.03 is: 58,245.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,017.13 : 107,663.54 = 42,207.03 : x
  2. Step 2: Convert to fraction form
    78,017.13/107,663.54 = 42,207.03/x
  3. Step 3: Cross multiply
    78,017.13x = 107,663.54 × 42,207.03
  4. Step 4: Simplify right side
    78,017.13x = 4,544,158,051.65
  5. Step 5: Solve for x
    x = 4,544,158,051.65/78,017.13
  6. Step 6: Final answer
    x = 58,245.64

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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.