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Finding the Fourth Proportional to 87,265.60, 120,424.80 and 51,457.12

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Solution

The fourth proportional to 87,265.60, 120,424.80 and 51,457.12 is: 71,009.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,265.60 : 120,424.80 = 51,457.12 : x
  2. Step 2: Convert to fraction form
    87,265.60/120,424.80 = 51,457.12/x
  3. Step 3: Cross multiply
    87,265.60x = 120,424.80 × 51,457.12
  4. Step 4: Simplify right side
    87,265.60x = 6,196,713,384.58
  5. Step 5: Solve for x
    x = 6,196,713,384.58/87,265.60
  6. Step 6: Final answer
    x = 71,009.81

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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.