Home / 138,900.48-208,376.64-45,411.36

Finding the Fourth Proportional to 138,900.48, 208,376.64 and 45,411.36

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Solution

The fourth proportional to 138,900.48, 208,376.64 and 45,411.36 is: 68,125.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,900.48 : 208,376.64 = 45,411.36 : x
  2. Step 2: Convert to fraction form
    138,900.48/208,376.64 = 45,411.36/x
  3. Step 3: Cross multiply
    138,900.48x = 208,376.64 × 45,411.36
  4. Step 4: Simplify right side
    138,900.48x = 9,462,666,614.63
  5. Step 5: Solve for x
    x = 9,462,666,614.63/138,900.48
  6. Step 6: Final answer
    x = 68,125.51

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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.