Home / 87,848.96-121,253.63-78,880.77

Finding the Fourth Proportional to 87,848.96, 121,253.63 and 78,880.77

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Solution

The fourth proportional to 87,848.96, 121,253.63 and 78,880.77 is: 108,875.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,848.96 : 121,253.63 = 78,880.77 : x
  2. Step 2: Convert to fraction form
    87,848.96/121,253.63 = 78,880.77/x
  3. Step 3: Cross multiply
    87,848.96x = 121,253.63 × 78,880.77
  4. Step 4: Simplify right side
    87,848.96x = 9,564,579,305.29
  5. Step 5: Solve for x
    x = 9,564,579,305.29/87,848.96
  6. Step 6: Final answer
    x = 108,875.28

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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.