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Finding the Fourth Proportional to 70,360.32, 105,430.32 and 42,211.20

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Solution

The fourth proportional to 70,360.32, 105,430.32 and 42,211.20 is: 63,250.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,360.32 : 105,430.32 = 42,211.20 : x
  2. Step 2: Convert to fraction form
    70,360.32/105,430.32 = 42,211.20/x
  3. Step 3: Cross multiply
    70,360.32x = 105,430.32 × 42,211.20
  4. Step 4: Simplify right side
    70,360.32x = 4,450,340,323.58
  5. Step 5: Solve for x
    x = 4,450,340,323.58/70,360.32
  6. Step 6: Final answer
    x = 63,250.71

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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.