Home / 105,702.28-145,838.82-69,879.22

Finding the Fourth Proportional to 105,702.28, 145,838.82 and 69,879.22

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Solution

The fourth proportional to 105,702.28, 145,838.82 and 69,879.22 is: 96,413.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,702.28 : 145,838.82 = 69,879.22 : x
  2. Step 2: Convert to fraction form
    105,702.28/145,838.82 = 69,879.22/x
  3. Step 3: Cross multiply
    105,702.28x = 145,838.82 × 69,879.22
  4. Step 4: Simplify right side
    105,702.28x = 10,191,102,987.32
  5. Step 5: Solve for x
    x = 10,191,102,987.32/105,702.28
  6. Step 6: Final answer
    x = 96,413.27

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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.