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Finding the Fourth Proportional to 459,009.60, 688,611.60 and 139,135.20

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Solution

The fourth proportional to 459,009.60, 688,611.60 and 139,135.20 is: 208,732.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,009.60 : 688,611.60 = 139,135.20 : x
  2. Step 2: Convert to fraction form
    459,009.60/688,611.60 = 139,135.20/x
  3. Step 3: Cross multiply
    459,009.60x = 688,611.60 × 139,135.20
  4. Step 4: Simplify right side
    459,009.60x = 95,810,112,688.32
  5. Step 5: Solve for x
    x = 95,810,112,688.32/459,009.60
  6. Step 6: Final answer
    x = 208,732.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.