Home / 153,105.90-211,212.45-99,407.76

Finding the Fourth Proportional to 153,105.90, 211,212.45 and 99,407.76

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Solution

The fourth proportional to 153,105.90, 211,212.45 and 99,407.76 is: 137,134.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,105.90 : 211,212.45 = 99,407.76 : x
  2. Step 2: Convert to fraction form
    153,105.90/211,212.45 = 99,407.76/x
  3. Step 3: Cross multiply
    153,105.90x = 211,212.45 × 99,407.76
  4. Step 4: Simplify right side
    153,105.90x = 20,996,156,538.61
  5. Step 5: Solve for x
    x = 20,996,156,538.61/153,105.90
  6. Step 6: Final answer
    x = 137,134.86

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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.