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Finding the Fourth Proportional to 199,459.61, 299,019.36 and 87,055.79

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Solution

The fourth proportional to 199,459.61, 299,019.36 and 87,055.79 is: 130,509.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,459.61 : 299,019.36 = 87,055.79 : x
  2. Step 2: Convert to fraction form
    199,459.61/299,019.36 = 87,055.79/x
  3. Step 3: Cross multiply
    199,459.61x = 299,019.36 × 87,055.79
  4. Step 4: Simplify right side
    199,459.61x = 26,031,366,610.09
  5. Step 5: Solve for x
    x = 26,031,366,610.09/199,459.61
  6. Step 6: Final answer
    x = 130,509.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.