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Finding the Fourth Proportional to 520,024, 780,036.04 and 126,040

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Solution

The fourth proportional to 520,024, 780,036.04 and 126,040 is: 189,060.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,024 : 780,036.04 = 126,040 : x
  2. Step 2: Convert to fraction form
    520,024/780,036.04 = 126,040/x
  3. Step 3: Cross multiply
    520,024x = 780,036.04 × 126,040
  4. Step 4: Simplify right side
    520,024x = 98,315,742,481.60
  5. Step 5: Solve for x
    x = 98,315,742,481.60/520,024
  6. Step 6: Final answer
    x = 189,060.01

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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.