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Finding the Fourth Proportional to 70,640.74, 97,482.89 and 40,428.25

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Solution

The fourth proportional to 70,640.74, 97,482.89 and 40,428.25 is: 55,790.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,640.74 : 97,482.89 = 40,428.25 : x
  2. Step 2: Convert to fraction form
    70,640.74/97,482.89 = 40,428.25/x
  3. Step 3: Cross multiply
    70,640.74x = 97,482.89 × 40,428.25
  4. Step 4: Simplify right side
    70,640.74x = 3,941,062,505.01
  5. Step 5: Solve for x
    x = 3,941,062,505.01/70,640.74
  6. Step 6: Final answer
    x = 55,790.22

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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.