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Finding the Fourth Proportional to 100,862.90, 145,429.20 and 100,862.90

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Solution

The fourth proportional to 100,862.90, 145,429.20 and 100,862.90 is: 145,429.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,862.90 : 145,429.20 = 100,862.90 : x
  2. Step 2: Convert to fraction form
    100,862.90/145,429.20 = 100,862.90/x
  3. Step 3: Cross multiply
    100,862.90x = 145,429.20 × 100,862.90
  4. Step 4: Simplify right side
    100,862.90x = 14,668,410,856.68
  5. Step 5: Solve for x
    x = 14,668,410,856.68/100,862.90
  6. Step 6: Final answer
    x = 145,429.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.