Home / 137,021.64-189,113.93-79,678.70

Finding the Fourth Proportional to 137,021.64, 189,113.93 and 79,678.70

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Solution

The fourth proportional to 137,021.64, 189,113.93 and 79,678.70 is: 109,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,021.64 : 189,113.93 = 79,678.70 : x
  2. Step 2: Convert to fraction form
    137,021.64/189,113.93 = 79,678.70/x
  3. Step 3: Cross multiply
    137,021.64x = 189,113.93 × 79,678.70
  4. Step 4: Simplify right side
    137,021.64x = 15,068,352,094.29
  5. Step 5: Solve for x
    x = 15,068,352,094.29/137,021.64
  6. Step 6: Final answer
    x = 109,970.60

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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.