Home / 137,488,986.72-189,739,790.81-78,763,001.76

Finding the Fourth Proportional to 137,488,986.72, 189,739,790.81 and 78,763,001.76

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Solution

The fourth proportional to 137,488,986.72, 189,739,790.81 and 78,763,001.76 is: 108,695,800.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,488,986.72 : 189,739,790.81 = 78,763,001.76 : x
  2. Step 2: Convert to fraction form
    137,488,986.72/189,739,790.81 = 78,763,001.76/x
  3. Step 3: Cross multiply
    137,488,986.72x = 189,739,790.81 × 78,763,001.76
  4. Step 4: Simplify right side
    137,488,986.72x = 14,944,475,477,116,248
  5. Step 5: Solve for x
    x = 14,944,475,477,116,248/137,488,986.72
  6. Step 6: Final answer
    x = 108,695,800.54

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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.