Home / 103,202.07-142,424.61-77,662.50

Finding the Fourth Proportional to 103,202.07, 142,424.61 and 77,662.50

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Solution

The fourth proportional to 103,202.07, 142,424.61 and 77,662.50 is: 107,178.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,202.07 : 142,424.61 = 77,662.50 : x
  2. Step 2: Convert to fraction form
    103,202.07/142,424.61 = 77,662.50/x
  3. Step 3: Cross multiply
    103,202.07x = 142,424.61 × 77,662.50
  4. Step 4: Simplify right side
    103,202.07x = 11,061,051,274.13
  5. Step 5: Solve for x
    x = 11,061,051,274.13/103,202.07
  6. Step 6: Final answer
    x = 107,178.58

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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.