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Finding the Fourth Proportional to 70,218.65, 105,300.41 and 30,240.74

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Solution

The fourth proportional to 70,218.65, 105,300.41 and 30,240.74 is: 45,349.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,218.65 : 105,300.41 = 30,240.74 : x
  2. Step 2: Convert to fraction form
    70,218.65/105,300.41 = 30,240.74/x
  3. Step 3: Cross multiply
    70,218.65x = 105,300.41 × 30,240.74
  4. Step 4: Simplify right side
    70,218.65x = 3,184,362,432.75
  5. Step 5: Solve for x
    x = 3,184,362,432.75/70,218.65
  6. Step 6: Final answer
    x = 45,349.24

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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.