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Finding the Fourth Proportional to 280,010.15, 420,069.90 and 111,501.80

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Solution

The fourth proportional to 280,010.15, 420,069.90 and 111,501.80 is: 167,274.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,010.15 : 420,069.90 = 111,501.80 : x
  2. Step 2: Convert to fraction form
    280,010.15/420,069.90 = 111,501.80/x
  3. Step 3: Cross multiply
    280,010.15x = 420,069.90 × 111,501.80
  4. Step 4: Simplify right side
    280,010.15x = 46,838,549,975.82
  5. Step 5: Solve for x
    x = 46,838,549,975.82/280,010.15
  6. Step 6: Final answer
    x = 167,274.47

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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.