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Finding the Fourth Proportional to 58,417.20, 81,939.60 and 58,417.20

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Solution

The fourth proportional to 58,417.20, 81,939.60 and 58,417.20 is: 81,939.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,417.20 : 81,939.60 = 58,417.20 : x
  2. Step 2: Convert to fraction form
    58,417.20/81,939.60 = 58,417.20/x
  3. Step 3: Cross multiply
    58,417.20x = 81,939.60 × 58,417.20
  4. Step 4: Simplify right side
    58,417.20x = 4,786,682,001.12
  5. Step 5: Solve for x
    x = 4,786,682,001.12/58,417.20
  6. Step 6: Final answer
    x = 81,939.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.