Home / 128,272.96-177,017.34-71,685.28

Finding the Fourth Proportional to 128,272.96, 177,017.34 and 71,685.28

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Solution

The fourth proportional to 128,272.96, 177,017.34 and 71,685.28 is: 98,926.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,272.96 : 177,017.34 = 71,685.28 : x
  2. Step 2: Convert to fraction form
    128,272.96/177,017.34 = 71,685.28/x
  3. Step 3: Cross multiply
    128,272.96x = 177,017.34 × 71,685.28
  4. Step 4: Simplify right side
    128,272.96x = 12,689,537,582.76
  5. Step 5: Solve for x
    x = 12,689,537,582.76/128,272.96
  6. Step 6: Final answer
    x = 98,926.05

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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.