Home / 153,407.12-211,701.72-86,340.56

Finding the Fourth Proportional to 153,407.12, 211,701.72 and 86,340.56

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Solution

The fourth proportional to 153,407.12, 211,701.72 and 86,340.56 is: 119,149.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,407.12 : 211,701.72 = 86,340.56 : x
  2. Step 2: Convert to fraction form
    153,407.12/211,701.72 = 86,340.56/x
  3. Step 3: Cross multiply
    153,407.12x = 211,701.72 × 86,340.56
  4. Step 4: Simplify right side
    153,407.12x = 18,278,445,057.76
  5. Step 5: Solve for x
    x = 18,278,445,057.76/153,407.12
  6. Step 6: Final answer
    x = 119,149.91

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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.