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Finding the Fourth Proportional to 70,034.12, 105,068.95 and 20,117.67

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Solution

The fourth proportional to 70,034.12, 105,068.95 and 20,117.67 is: 30,181.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,034.12 : 105,068.95 = 20,117.67 : x
  2. Step 2: Convert to fraction form
    70,034.12/105,068.95 = 20,117.67/x
  3. Step 3: Cross multiply
    70,034.12x = 105,068.95 × 20,117.67
  4. Step 4: Simplify right side
    70,034.12x = 2,113,742,019.04
  5. Step 5: Solve for x
    x = 2,113,742,019.04/70,034.12
  6. Step 6: Final answer
    x = 30,181.60

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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.