Home / 81,056.08-121,444.40-72,838.48

Finding the Fourth Proportional to 81,056.08, 121,444.40 and 72,838.48

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Solution

The fourth proportional to 81,056.08, 121,444.40 and 72,838.48 is: 109,132.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,056.08 : 121,444.40 = 72,838.48 : x
  2. Step 2: Convert to fraction form
    81,056.08/121,444.40 = 72,838.48/x
  3. Step 3: Cross multiply
    81,056.08x = 121,444.40 × 72,838.48
  4. Step 4: Simplify right side
    81,056.08x = 8,845,825,500.51
  5. Step 5: Solve for x
    x = 8,845,825,500.51/81,056.08
  6. Step 6: Final answer
    x = 109,132.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.