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Finding the Fourth Proportional to 83,485.65, 115,210.53 and 45,245.28

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Solution

The fourth proportional to 83,485.65, 115,210.53 and 45,245.28 is: 62,438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,485.65 : 115,210.53 = 45,245.28 : x
  2. Step 2: Convert to fraction form
    83,485.65/115,210.53 = 45,245.28/x
  3. Step 3: Cross multiply
    83,485.65x = 115,210.53 × 45,245.28
  4. Step 4: Simplify right side
    83,485.65x = 5,212,732,688.80
  5. Step 5: Solve for x
    x = 5,212,732,688.80/83,485.65
  6. Step 6: Final answer
    x = 62,438.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.