Home / 142,030.91-196,002.51-78,368.71

Finding the Fourth Proportional to 142,030.91, 196,002.51 and 78,368.71

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Solution

The fourth proportional to 142,030.91, 196,002.51 and 78,368.71 is: 108,148.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,030.91 : 196,002.51 = 78,368.71 : x
  2. Step 2: Convert to fraction form
    142,030.91/196,002.51 = 78,368.71/x
  3. Step 3: Cross multiply
    142,030.91x = 196,002.51 × 78,368.71
  4. Step 4: Simplify right side
    142,030.91x = 15,360,463,865.46
  5. Step 5: Solve for x
    x = 15,360,463,865.46/142,030.91
  6. Step 6: Final answer
    x = 108,148.74

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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.