Home / 103,979.09-143,360.93-86,776.10

Finding the Fourth Proportional to 103,979.09, 143,360.93 and 86,776.10

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Solution

The fourth proportional to 103,979.09, 143,360.93 and 86,776.10 is: 119,642.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,979.09 : 143,360.93 = 86,776.10 : x
  2. Step 2: Convert to fraction form
    103,979.09/143,360.93 = 86,776.10/x
  3. Step 3: Cross multiply
    103,979.09x = 143,360.93 × 86,776.10
  4. Step 4: Simplify right side
    103,979.09x = 12,440,301,247.09
  5. Step 5: Solve for x
    x = 12,440,301,247.09/103,979.09
  6. Step 6: Final answer
    x = 119,642.34

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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.