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Finding the Fourth Proportional to 98,312.99, 135,683.46 and 55,877.90

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Solution

The fourth proportional to 98,312.99, 135,683.46 and 55,877.90 is: 77,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,312.99 : 135,683.46 = 55,877.90 : x
  2. Step 2: Convert to fraction form
    98,312.99/135,683.46 = 55,877.90/x
  3. Step 3: Cross multiply
    98,312.99x = 135,683.46 × 55,877.90
  4. Step 4: Simplify right side
    98,312.99x = 7,581,706,131.12
  5. Step 5: Solve for x
    x = 7,581,706,131.12/98,312.99
  6. Step 6: Final answer
    x = 77,118.05

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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.