Home / 111,145.04-153,430.20-70,912.88

Finding the Fourth Proportional to 111,145.04, 153,430.20 and 70,912.88

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Solution

The fourth proportional to 111,145.04, 153,430.20 and 70,912.88 is: 97,891.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,145.04 : 153,430.20 = 70,912.88 : x
  2. Step 2: Convert to fraction form
    111,145.04/153,430.20 = 70,912.88/x
  3. Step 3: Cross multiply
    111,145.04x = 153,430.20 × 70,912.88
  4. Step 4: Simplify right side
    111,145.04x = 10,880,177,360.98
  5. Step 5: Solve for x
    x = 10,880,177,360.98/111,145.04
  6. Step 6: Final answer
    x = 97,891.70

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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.