Home / 138,045.81-190,501.11-77,616.51

Finding the Fourth Proportional to 138,045.81, 190,501.11 and 77,616.51

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Solution

The fourth proportional to 138,045.81, 190,501.11 and 77,616.51 is: 107,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,045.81 : 190,501.11 = 77,616.51 : x
  2. Step 2: Convert to fraction form
    138,045.81/190,501.11 = 77,616.51/x
  3. Step 3: Cross multiply
    138,045.81x = 190,501.11 × 77,616.51
  4. Step 4: Simplify right side
    138,045.81x = 14,786,031,309.33
  5. Step 5: Solve for x
    x = 14,786,031,309.33/138,045.81
  6. Step 6: Final answer
    x = 107,109.60

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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.