Home / 128,597.40-177,464.25-72,009.18

Finding the Fourth Proportional to 128,597.40, 177,464.25 and 72,009.18

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Solution

The fourth proportional to 128,597.40, 177,464.25 and 72,009.18 is: 99,372.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,597.40 : 177,464.25 = 72,009.18 : x
  2. Step 2: Convert to fraction form
    128,597.40/177,464.25 = 72,009.18/x
  3. Step 3: Cross multiply
    128,597.40x = 177,464.25 × 72,009.18
  4. Step 4: Simplify right side
    128,597.40x = 12,779,055,121.82
  5. Step 5: Solve for x
    x = 12,779,055,121.82/128,597.40
  6. Step 6: Final answer
    x = 99,372.58

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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.