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Finding the Fourth Proportional to 153,672.59, 211,942.82 and 129,048.32

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Solution

The fourth proportional to 153,672.59, 211,942.82 and 129,048.32 is: 177,981.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,672.59 : 211,942.82 = 129,048.32 : x
  2. Step 2: Convert to fraction form
    153,672.59/211,942.82 = 129,048.32/x
  3. Step 3: Cross multiply
    153,672.59x = 211,942.82 × 129,048.32
  4. Step 4: Simplify right side
    153,672.59x = 27,350,863,152.11
  5. Step 5: Solve for x
    x = 27,350,863,152.11/153,672.59
  6. Step 6: Final answer
    x = 177,981.41

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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.