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Finding the Fourth Proportional to 115,531.61, 159,430.50 and 63,141.51

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Solution

The fourth proportional to 115,531.61, 159,430.50 and 63,141.51 is: 87,133.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,531.61 : 159,430.50 = 63,141.51 : x
  2. Step 2: Convert to fraction form
    115,531.61/159,430.50 = 63,141.51/x
  3. Step 3: Cross multiply
    115,531.61x = 159,430.50 × 63,141.51
  4. Step 4: Simplify right side
    115,531.61x = 10,066,682,510.06
  5. Step 5: Solve for x
    x = 10,066,682,510.06/115,531.61
  6. Step 6: Final answer
    x = 87,133.58

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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.