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Finding the Fourth Proportional to 420,015.50, 630,023.26 and 124,527.50

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Solution

The fourth proportional to 420,015.50, 630,023.26 and 124,527.50 is: 186,791.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,015.50 : 630,023.26 = 124,527.50 : x
  2. Step 2: Convert to fraction form
    420,015.50/630,023.26 = 124,527.50/x
  3. Step 3: Cross multiply
    420,015.50x = 630,023.26 × 124,527.50
  4. Step 4: Simplify right side
    420,015.50x = 78,455,221,509.65
  5. Step 5: Solve for x
    x = 78,455,221,509.65/420,015.50
  6. Step 6: Final answer
    x = 186,791.25

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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.