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Finding the Fourth Proportional to 108,345.40, 162,486.36 and 40,828.72

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Solution

The fourth proportional to 108,345.40, 162,486.36 and 40,828.72 is: 61,231.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,345.40 : 162,486.36 = 40,828.72 : x
  2. Step 2: Convert to fraction form
    108,345.40/162,486.36 = 40,828.72/x
  3. Step 3: Cross multiply
    108,345.40x = 162,486.36 × 40,828.72
  4. Step 4: Simplify right side
    108,345.40x = 6,634,110,096.26
  5. Step 5: Solve for x
    x = 6,634,110,096.26/108,345.40
  6. Step 6: Final answer
    x = 61,231.12

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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.