Home / 130,660.76-180,413.52-100,398.08

Finding the Fourth Proportional to 130,660.76, 180,413.52 and 100,398.08

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Solution

The fourth proportional to 130,660.76, 180,413.52 and 100,398.08 is: 138,627.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,660.76 : 180,413.52 = 100,398.08 : x
  2. Step 2: Convert to fraction form
    130,660.76/180,413.52 = 100,398.08/x
  3. Step 3: Cross multiply
    130,660.76x = 180,413.52 × 100,398.08
  4. Step 4: Simplify right side
    130,660.76x = 18,113,171,014.04
  5. Step 5: Solve for x
    x = 18,113,171,014.04/130,660.76
  6. Step 6: Final answer
    x = 138,627.47

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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.