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Finding the Fourth Proportional to 99,259.60, 136,984.32 and 56,817.12

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Solution

The fourth proportional to 99,259.60, 136,984.32 and 56,817.12 is: 78,411.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,259.60 : 136,984.32 = 56,817.12 : x
  2. Step 2: Convert to fraction form
    99,259.60/136,984.32 = 56,817.12/x
  3. Step 3: Cross multiply
    99,259.60x = 136,984.32 × 56,817.12
  4. Step 4: Simplify right side
    99,259.60x = 7,783,054,547.56
  5. Step 5: Solve for x
    x = 7,783,054,547.56/99,259.60
  6. Step 6: Final answer
    x = 78,411.10

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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.