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Finding the Fourth Proportional to 111,314.40, 166,971.60 and 28,208.40

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Solution

The fourth proportional to 111,314.40, 166,971.60 and 28,208.40 is: 42,312.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,314.40 : 166,971.60 = 28,208.40 : x
  2. Step 2: Convert to fraction form
    111,314.40/166,971.60 = 28,208.40/x
  3. Step 3: Cross multiply
    111,314.40x = 166,971.60 × 28,208.40
  4. Step 4: Simplify right side
    111,314.40x = 4,710,001,681.44
  5. Step 5: Solve for x
    x = 4,710,001,681.44/111,314.40
  6. Step 6: Final answer
    x = 42,312.60

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1.5x scale

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.