Home / 142,345.02-196,428.45-78,679.02

Finding the Fourth Proportional to 142,345.02, 196,428.45 and 78,679.02

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Solution

The fourth proportional to 142,345.02, 196,428.45 and 78,679.02 is: 108,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,345.02 : 196,428.45 = 78,679.02 : x
  2. Step 2: Convert to fraction form
    142,345.02/196,428.45 = 78,679.02/x
  3. Step 3: Cross multiply
    142,345.02x = 196,428.45 × 78,679.02
  4. Step 4: Simplify right side
    142,345.02x = 15,454,797,946.12
  5. Step 5: Solve for x
    x = 15,454,797,946.12/142,345.02
  6. Step 6: Final answer
    x = 108,572.80

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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.