Home / 115,491.36-159,384.48-81,510.72

Finding the Fourth Proportional to 115,491.36, 159,384.48 and 81,510.72

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Solution

The fourth proportional to 115,491.36, 159,384.48 and 81,510.72 is: 112,489.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,491.36 : 159,384.48 = 81,510.72 : x
  2. Step 2: Convert to fraction form
    115,491.36/159,384.48 = 81,510.72/x
  3. Step 3: Cross multiply
    115,491.36x = 159,384.48 × 81,510.72
  4. Step 4: Simplify right side
    115,491.36x = 12,991,543,721.63
  5. Step 5: Solve for x
    x = 12,991,543,721.63/115,491.36
  6. Step 6: Final answer
    x = 112,489.31

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1.5x scale

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.