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Finding the Fourth Proportional to 127,528.65, 191,128.95 and 77,555.70

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Solution

The fourth proportional to 127,528.65, 191,128.95 and 77,555.70 is: 116,233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,528.65 : 191,128.95 = 77,555.70 : x
  2. Step 2: Convert to fraction form
    127,528.65/191,128.95 = 77,555.70/x
  3. Step 3: Cross multiply
    127,528.65x = 191,128.95 × 77,555.70
  4. Step 4: Simplify right side
    127,528.65x = 14,823,139,507.52
  5. Step 5: Solve for x
    x = 14,823,139,507.52/127,528.65
  6. Step 6: Final answer
    x = 116,233.80

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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.