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Finding the Fourth Proportional to 194,785.60, 292,178.40 and 128,430.40

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Solution

The fourth proportional to 194,785.60, 292,178.40 and 128,430.40 is: 192,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,785.60 : 292,178.40 = 128,430.40 : x
  2. Step 2: Convert to fraction form
    194,785.60/292,178.40 = 128,430.40/x
  3. Step 3: Cross multiply
    194,785.60x = 292,178.40 × 128,430.40
  4. Step 4: Simplify right side
    194,785.60x = 37,524,588,783.36
  5. Step 5: Solve for x
    x = 37,524,588,783.36/194,785.60
  6. Step 6: Final answer
    x = 192,645.60

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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.