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Finding the Fourth Proportional to 100,861.40, 145,427.04 and 100,861.40

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Solution

The fourth proportional to 100,861.40, 145,427.04 and 100,861.40 is: 145,427.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,861.40 : 145,427.04 = 100,861.40 : x
  2. Step 2: Convert to fraction form
    100,861.40/145,427.04 = 100,861.40/x
  3. Step 3: Cross multiply
    100,861.40x = 145,427.04 × 100,861.40
  4. Step 4: Simplify right side
    100,861.40x = 14,667,974,852.26
  5. Step 5: Solve for x
    x = 14,667,974,852.26/100,861.40
  6. Step 6: Final answer
    x = 145,427.04

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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.