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Finding the Fourth Proportional to 70,350.40, 97,092.80 and 40,128.80

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Solution

The fourth proportional to 70,350.40, 97,092.80 and 40,128.80 is: 55,383.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,350.40 : 97,092.80 = 40,128.80 : x
  2. Step 2: Convert to fraction form
    70,350.40/97,092.80 = 40,128.80/x
  3. Step 3: Cross multiply
    70,350.40x = 97,092.80 × 40,128.80
  4. Step 4: Simplify right side
    70,350.40x = 3,896,217,552.64
  5. Step 5: Solve for x
    x = 3,896,217,552.64/70,350.40
  6. Step 6: Final answer
    x = 55,383.02

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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.