Home / 99,243.76-136,959-56,815.96

Finding the Fourth Proportional to 99,243.76, 136,959 and 56,815.96

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Solution

The fourth proportional to 99,243.76, 136,959 and 56,815.96 is: 78,407.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,243.76 : 136,959 = 56,815.96 : x
  2. Step 2: Convert to fraction form
    99,243.76/136,959 = 56,815.96/x
  3. Step 3: Cross multiply
    99,243.76x = 136,959 × 56,815.96
  4. Step 4: Simplify right side
    99,243.76x = 7,781,457,065.64
  5. Step 5: Solve for x
    x = 7,781,457,065.64/99,243.76
  6. Step 6: Final answer
    x = 78,407.52

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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.