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Finding the Fourth Proportional to 98,809.72, 136,344.60 and 56,365.72

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Solution

The fourth proportional to 98,809.72, 136,344.60 and 56,365.72 is: 77,777.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,809.72 : 136,344.60 = 56,365.72 : x
  2. Step 2: Convert to fraction form
    98,809.72/136,344.60 = 56,365.72/x
  3. Step 3: Cross multiply
    98,809.72x = 136,344.60 × 56,365.72
  4. Step 4: Simplify right side
    98,809.72x = 7,685,161,547.11
  5. Step 5: Solve for x
    x = 7,685,161,547.11/98,809.72
  6. Step 6: Final answer
    x = 77,777.38

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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.