Home / 107,619.40-161,429.10-77,897.80

Finding the Fourth Proportional to 107,619.40, 161,429.10 and 77,897.80

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Solution

The fourth proportional to 107,619.40, 161,429.10 and 77,897.80 is: 116,846.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,619.40 : 161,429.10 = 77,897.80 : x
  2. Step 2: Convert to fraction form
    107,619.40/161,429.10 = 77,897.80/x
  3. Step 3: Cross multiply
    107,619.40x = 161,429.10 × 77,897.80
  4. Step 4: Simplify right side
    107,619.40x = 12,574,971,745.98
  5. Step 5: Solve for x
    x = 12,574,971,745.98/107,619.40
  6. Step 6: Final answer
    x = 116,846.70

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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.