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Finding the Fourth Proportional to 128,031.52, 191,790.06 and 63,795.91

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Solution

The fourth proportional to 128,031.52, 191,790.06 and 63,795.91 is: 95,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.52 : 191,790.06 = 63,795.91 : x
  2. Step 2: Convert to fraction form
    128,031.52/191,790.06 = 63,795.91/x
  3. Step 3: Cross multiply
    128,031.52x = 191,790.06 × 63,795.91
  4. Step 4: Simplify right side
    128,031.52x = 12,235,421,406.65
  5. Step 5: Solve for x
    x = 12,235,421,406.65/128,031.52
  6. Step 6: Final answer
    x = 95,565.70

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1.5x scale

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.