Home / 101,045.10-151,470.45-78,543.30

Finding the Fourth Proportional to 101,045.10, 151,470.45 and 78,543.30

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Solution

The fourth proportional to 101,045.10, 151,470.45 and 78,543.30 is: 117,739.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,045.10 : 151,470.45 = 78,543.30 : x
  2. Step 2: Convert to fraction form
    101,045.10/151,470.45 = 78,543.30/x
  3. Step 3: Cross multiply
    101,045.10x = 151,470.45 × 78,543.30
  4. Step 4: Simplify right side
    101,045.10x = 11,896,988,995.49
  5. Step 5: Solve for x
    x = 11,896,988,995.49/101,045.10
  6. Step 6: Final answer
    x = 117,739.40

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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.