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Finding the Fourth Proportional to 306,071.60, 459,107.40 and 128,519.60

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Solution

The fourth proportional to 306,071.60, 459,107.40 and 128,519.60 is: 192,779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,071.60 : 459,107.40 = 128,519.60 : x
  2. Step 2: Convert to fraction form
    306,071.60/459,107.40 = 128,519.60/x
  3. Step 3: Cross multiply
    306,071.60x = 459,107.40 × 128,519.60
  4. Step 4: Simplify right side
    306,071.60x = 59,004,299,405.04
  5. Step 5: Solve for x
    x = 59,004,299,405.04/306,071.60
  6. Step 6: Final answer
    x = 192,779.40

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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.