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Finding the Fourth Proportional to 98,865.97, 136,444.84 and 56,430.88

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Solution

The fourth proportional to 98,865.97, 136,444.84 and 56,430.88 is: 77,880.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,865.97 : 136,444.84 = 56,430.88 : x
  2. Step 2: Convert to fraction form
    98,865.97/136,444.84 = 56,430.88/x
  3. Step 3: Cross multiply
    98,865.97x = 136,444.84 × 56,430.88
  4. Step 4: Simplify right side
    98,865.97x = 7,699,701,910.47
  5. Step 5: Solve for x
    x = 7,699,701,910.47/98,865.97
  6. Step 6: Final answer
    x = 77,880.21

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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.