Home / 136,973,573.32-189,013,040.58-78,228,128.92

Finding the Fourth Proportional to 136,973,573.32, 189,013,040.58 and 78,228,128.92

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Solution

The fourth proportional to 136,973,573.32, 189,013,040.58 and 78,228,128.92 is: 107,948,826.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,973,573.32 : 189,013,040.58 = 78,228,128.92 : x
  2. Step 2: Convert to fraction form
    136,973,573.32/189,013,040.58 = 78,228,128.92/x
  3. Step 3: Cross multiply
    136,973,573.32x = 189,013,040.58 × 78,228,128.92
  4. Step 4: Simplify right side
    136,973,573.32x = 14,786,136,506,053,432
  5. Step 5: Solve for x
    x = 14,786,136,506,053,432/136,973,573.32
  6. Step 6: Final answer
    x = 107,948,826.53

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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.