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Finding the Fourth Proportional to 99,387.03, 137,157.71 and 56,953.77

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Solution

The fourth proportional to 99,387.03, 137,157.71 and 56,953.77 is: 78,598.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,387.03 : 137,157.71 = 56,953.77 : x
  2. Step 2: Convert to fraction form
    99,387.03/137,157.71 = 56,953.77/x
  3. Step 3: Cross multiply
    99,387.03x = 137,157.71 × 56,953.77
  4. Step 4: Simplify right side
    99,387.03x = 7,811,648,384.30
  5. Step 5: Solve for x
    x = 7,811,648,384.30/99,387.03
  6. Step 6: Final answer
    x = 78,598.27

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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.