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Finding the Fourth Proportional to 128,348.21, 177,117.44 and 70,986.04

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Solution

The fourth proportional to 128,348.21, 177,117.44 and 70,986.04 is: 97,959.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,348.21 : 177,117.44 = 70,986.04 : x
  2. Step 2: Convert to fraction form
    128,348.21/177,117.44 = 70,986.04/x
  3. Step 3: Cross multiply
    128,348.21x = 177,117.44 × 70,986.04
  4. Step 4: Simplify right side
    128,348.21x = 12,572,864,882.81
  5. Step 5: Solve for x
    x = 12,572,864,882.81/128,348.21
  6. Step 6: Final answer
    x = 97,959.02

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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.