Home / 136,970.88-189,038.58-78,826.40

Finding the Fourth Proportional to 136,970.88, 189,038.58 and 78,826.40

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Solution

The fourth proportional to 136,970.88, 189,038.58 and 78,826.40 is: 108,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,970.88 : 189,038.58 = 78,826.40 : x
  2. Step 2: Convert to fraction form
    136,970.88/189,038.58 = 78,826.40/x
  3. Step 3: Cross multiply
    136,970.88x = 189,038.58 × 78,826.40
  4. Step 4: Simplify right side
    136,970.88x = 14,901,230,722.51
  5. Step 5: Solve for x
    x = 14,901,230,722.51/136,970.88
  6. Step 6: Final answer
    x = 108,791.23

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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.