Home / 128,335.96-177,104.80-70,972.32

Finding the Fourth Proportional to 128,335.96, 177,104.80 and 70,972.32

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Solution

The fourth proportional to 128,335.96, 177,104.80 and 70,972.32 is: 97,942.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,335.96 : 177,104.80 = 70,972.32 : x
  2. Step 2: Convert to fraction form
    128,335.96/177,104.80 = 70,972.32/x
  3. Step 3: Cross multiply
    128,335.96x = 177,104.80 × 70,972.32
  4. Step 4: Simplify right side
    128,335.96x = 12,569,538,539.14
  5. Step 5: Solve for x
    x = 12,569,538,539.14/128,335.96
  6. Step 6: Final answer
    x = 97,942.45

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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.