Home / 137,428.09-189,647.45-77,001.28

Finding the Fourth Proportional to 137,428.09, 189,647.45 and 77,001.28

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Solution

The fourth proportional to 137,428.09, 189,647.45 and 77,001.28 is: 106,259.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,428.09 : 189,647.45 = 77,001.28 : x
  2. Step 2: Convert to fraction form
    137,428.09/189,647.45 = 77,001.28/x
  3. Step 3: Cross multiply
    137,428.09x = 189,647.45 × 77,001.28
  4. Step 4: Simplify right side
    137,428.09x = 14,603,095,450.50
  5. Step 5: Solve for x
    x = 14,603,095,450.50/137,428.09
  6. Step 6: Final answer
    x = 106,259.91

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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.