Home / 111,017.90-153,221.96-72,888.07

Finding the Fourth Proportional to 111,017.90, 153,221.96 and 72,888.07

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Solution

The fourth proportional to 111,017.90, 153,221.96 and 72,888.07 is: 100,596.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,017.90 : 153,221.96 = 72,888.07 : x
  2. Step 2: Convert to fraction form
    111,017.90/153,221.96 = 72,888.07/x
  3. Step 3: Cross multiply
    111,017.90x = 153,221.96 × 72,888.07
  4. Step 4: Simplify right side
    111,017.90x = 11,168,052,946.02
  5. Step 5: Solve for x
    x = 11,168,052,946.02/111,017.90
  6. Step 6: Final answer
    x = 100,596.87

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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.