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Finding the Fourth Proportional to 72,071.28, 99,554.40 and 57,977.28

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Solution

The fourth proportional to 72,071.28, 99,554.40 and 57,977.28 is: 80,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,071.28 : 99,554.40 = 57,977.28 : x
  2. Step 2: Convert to fraction form
    72,071.28/99,554.40 = 57,977.28/x
  3. Step 3: Cross multiply
    72,071.28x = 99,554.40 × 57,977.28
  4. Step 4: Simplify right side
    72,071.28x = 5,771,893,324.03
  5. Step 5: Solve for x
    x = 5,771,893,324.03/72,071.28
  6. Step 6: Final answer
    x = 80,085.90

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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.