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Finding the Fourth Proportional to 98,668.40, 148,002.60 and 51,429.20

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Solution

The fourth proportional to 98,668.40, 148,002.60 and 51,429.20 is: 77,143.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,668.40 : 148,002.60 = 51,429.20 : x
  2. Step 2: Convert to fraction form
    98,668.40/148,002.60 = 51,429.20/x
  3. Step 3: Cross multiply
    98,668.40x = 148,002.60 × 51,429.20
  4. Step 4: Simplify right side
    98,668.40x = 7,611,655,315.92
  5. Step 5: Solve for x
    x = 7,611,655,315.92/98,668.40
  6. Step 6: Final answer
    x = 77,143.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.