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Finding the Fourth Proportional to 57,242.56, 78,928.32 and 53,700.16

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Solution

The fourth proportional to 57,242.56, 78,928.32 and 53,700.16 is: 74,043.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,242.56 : 78,928.32 = 53,700.16 : x
  2. Step 2: Convert to fraction form
    57,242.56/78,928.32 = 53,700.16/x
  3. Step 3: Cross multiply
    57,242.56x = 78,928.32 × 53,700.16
  4. Step 4: Simplify right side
    57,242.56x = 4,238,463,412.53
  5. Step 5: Solve for x
    x = 4,238,463,412.53/57,242.56
  6. Step 6: Final answer
    x = 74,043.92

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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.