Home / 115,681.87-159,649.12-64,699.35

Finding the Fourth Proportional to 115,681.87, 159,649.12 and 64,699.35

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Solution

The fourth proportional to 115,681.87, 159,649.12 and 64,699.35 is: 89,289.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,681.87 : 159,649.12 = 64,699.35 : x
  2. Step 2: Convert to fraction form
    115,681.87/159,649.12 = 64,699.35/x
  3. Step 3: Cross multiply
    115,681.87x = 159,649.12 × 64,699.35
  4. Step 4: Simplify right side
    115,681.87x = 10,329,194,292.07
  5. Step 5: Solve for x
    x = 10,329,194,292.07/115,681.87
  6. Step 6: Final answer
    x = 89,289.66

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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.