Home / 51,128.57-70,543.20-30,705.18

Finding the Fourth Proportional to 51,128.57, 70,543.20 and 30,705.18

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Solution

The fourth proportional to 51,128.57, 70,543.20 and 30,705.18 is: 42,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,128.57 : 70,543.20 = 30,705.18 : x
  2. Step 2: Convert to fraction form
    51,128.57/70,543.20 = 30,705.18/x
  3. Step 3: Cross multiply
    51,128.57x = 70,543.20 × 30,705.18
  4. Step 4: Simplify right side
    51,128.57x = 2,166,041,504.38
  5. Step 5: Solve for x
    x = 2,166,041,504.38/51,128.57
  6. Step 6: Final answer
    x = 42,364.60

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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.