Home / 99,189.26-136,905-56,772.40

Finding the Fourth Proportional to 99,189.26, 136,905 and 56,772.40

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Solution

The fourth proportional to 99,189.26, 136,905 and 56,772.40 is: 78,359.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,189.26 : 136,905 = 56,772.40 : x
  2. Step 2: Convert to fraction form
    99,189.26/136,905 = 56,772.40/x
  3. Step 3: Cross multiply
    99,189.26x = 136,905 × 56,772.40
  4. Step 4: Simplify right side
    99,189.26x = 7,772,425,422
  5. Step 5: Solve for x
    x = 7,772,425,422/99,189.26
  6. Step 6: Final answer
    x = 78,359.55

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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.