Home / 137,129.36-189,256.05-76,703.36

Finding the Fourth Proportional to 137,129.36, 189,256.05 and 76,703.36

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Solution

The fourth proportional to 137,129.36, 189,256.05 and 76,703.36 is: 105,860.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,129.36 : 189,256.05 = 76,703.36 : x
  2. Step 2: Convert to fraction form
    137,129.36/189,256.05 = 76,703.36/x
  3. Step 3: Cross multiply
    137,129.36x = 189,256.05 × 76,703.36
  4. Step 4: Simplify right side
    137,129.36x = 14,516,574,551.81
  5. Step 5: Solve for x
    x = 14,516,574,551.81/137,129.36
  6. Step 6: Final answer
    x = 105,860.44

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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.