Home / 130,392.72-179,884.80-100,124.64

Finding the Fourth Proportional to 130,392.72, 179,884.80 and 100,124.64

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Solution

The fourth proportional to 130,392.72, 179,884.80 and 100,124.64 is: 138,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,392.72 : 179,884.80 = 100,124.64 : x
  2. Step 2: Convert to fraction form
    130,392.72/179,884.80 = 100,124.64/x
  3. Step 3: Cross multiply
    130,392.72x = 179,884.80 × 100,124.64
  4. Step 4: Simplify right side
    130,392.72x = 18,010,900,841.47
  5. Step 5: Solve for x
    x = 18,010,900,841.47/130,392.72
  6. Step 6: Final answer
    x = 138,128.12

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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.