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Finding the Fourth Proportional to 128,602.24, 177,467.06 and 71,239.24

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Solution

The fourth proportional to 128,602.24, 177,467.06 and 71,239.24 is: 98,307.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,602.24 : 177,467.06 = 71,239.24 : x
  2. Step 2: Convert to fraction form
    128,602.24/177,467.06 = 71,239.24/x
  3. Step 3: Cross multiply
    128,602.24x = 177,467.06 × 71,239.24
  4. Step 4: Simplify right side
    128,602.24x = 12,642,618,479.43
  5. Step 5: Solve for x
    x = 12,642,618,479.43/128,602.24
  6. Step 6: Final answer
    x = 98,307.92

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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.