Home / 142,148.14-196,163.16-78,484.56

Finding the Fourth Proportional to 142,148.14, 196,163.16 and 78,484.56

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Solution

The fourth proportional to 142,148.14, 196,163.16 and 78,484.56 is: 108,307.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,148.14 : 196,163.16 = 78,484.56 : x
  2. Step 2: Convert to fraction form
    142,148.14/196,163.16 = 78,484.56/x
  3. Step 3: Cross multiply
    142,148.14x = 196,163.16 × 78,484.56
  4. Step 4: Simplify right side
    142,148.14x = 15,395,779,300.81
  5. Step 5: Solve for x
    x = 15,395,779,300.81/142,148.14
  6. Step 6: Final answer
    x = 108,307.99

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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.