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Finding the Fourth Proportional to 158,709.66, 219,018.74 and 87,090.89

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Solution

The fourth proportional to 158,709.66, 219,018.74 and 87,090.89 is: 120,185.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,709.66 : 219,018.74 = 87,090.89 : x
  2. Step 2: Convert to fraction form
    158,709.66/219,018.74 = 87,090.89/x
  3. Step 3: Cross multiply
    158,709.66x = 219,018.74 × 87,090.89
  4. Step 4: Simplify right side
    158,709.66x = 19,074,535,462.73
  5. Step 5: Solve for x
    x = 19,074,535,462.73/158,709.66
  6. Step 6: Final answer
    x = 120,185.09

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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.