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Finding the Fourth Proportional to 338,739.02, 508,108.73 and 86,038.46

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Solution

The fourth proportional to 338,739.02, 508,108.73 and 86,038.46 is: 129,057.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,739.02 : 508,108.73 = 86,038.46 : x
  2. Step 2: Convert to fraction form
    338,739.02/508,108.73 = 86,038.46/x
  3. Step 3: Cross multiply
    338,739.02x = 508,108.73 × 86,038.46
  4. Step 4: Simplify right side
    338,739.02x = 43,716,894,127.12
  5. Step 5: Solve for x
    x = 43,716,894,127.12/338,739.02
  6. Step 6: Final answer
    x = 129,057.74

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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.