Home / 142,030.78-196,002.34-78,368.58

Finding the Fourth Proportional to 142,030.78, 196,002.34 and 78,368.58

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Solution

The fourth proportional to 142,030.78, 196,002.34 and 78,368.58 is: 108,148.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,030.78 : 196,002.34 = 78,368.58 : x
  2. Step 2: Convert to fraction form
    142,030.78/196,002.34 = 78,368.58/x
  3. Step 3: Cross multiply
    142,030.78x = 196,002.34 × 78,368.58
  4. Step 4: Simplify right side
    142,030.78x = 15,360,424,866.56
  5. Step 5: Solve for x
    x = 15,360,424,866.56/142,030.78
  6. Step 6: Final answer
    x = 108,148.57

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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.