Home / 142,428.85-196,543.82-77,885.28

Finding the Fourth Proportional to 142,428.85, 196,543.82 and 77,885.28

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Solution

The fourth proportional to 142,428.85, 196,543.82 and 77,885.28 is: 107,477.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,428.85 : 196,543.82 = 77,885.28 : x
  2. Step 2: Convert to fraction form
    142,428.85/196,543.82 = 77,885.28/x
  3. Step 3: Cross multiply
    142,428.85x = 196,543.82 × 77,885.28
  4. Step 4: Simplify right side
    142,428.85x = 15,307,870,647.68
  5. Step 5: Solve for x
    x = 15,307,870,647.68/142,428.85
  6. Step 6: Final answer
    x = 107,477.32

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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.