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Finding the Fourth Proportional to 70,159.12, 105,237.88 and 20,237.57

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Solution

The fourth proportional to 70,159.12, 105,237.88 and 20,237.57 is: 30,356.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,159.12 : 105,237.88 = 20,237.57 : x
  2. Step 2: Convert to fraction form
    70,159.12/105,237.88 = 20,237.57/x
  3. Step 3: Cross multiply
    70,159.12x = 105,237.88 × 20,237.57
  4. Step 4: Simplify right side
    70,159.12x = 2,129,758,963.15
  5. Step 5: Solve for x
    x = 2,129,758,963.15/70,159.12
  6. Step 6: Final answer
    x = 30,356.12

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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.