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Finding the Fourth Proportional to 128,008.71, 176,650.74 and 70,648.56

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Solution

The fourth proportional to 128,008.71, 176,650.74 and 70,648.56 is: 97,494.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,008.71 : 176,650.74 = 70,648.56 : x
  2. Step 2: Convert to fraction form
    128,008.71/176,650.74 = 70,648.56/x
  3. Step 3: Cross multiply
    128,008.71x = 176,650.74 × 70,648.56
  4. Step 4: Simplify right side
    128,008.71x = 12,480,120,403.93
  5. Step 5: Solve for x
    x = 12,480,120,403.93/128,008.71
  6. Step 6: Final answer
    x = 97,494.31

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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.