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Finding the Fourth Proportional to 459,111.60, 688,764.60 and 139,237.20

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Solution

The fourth proportional to 459,111.60, 688,764.60 and 139,237.20 is: 208,885.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,111.60 : 688,764.60 = 139,237.20 : x
  2. Step 2: Convert to fraction form
    459,111.60/688,764.60 = 139,237.20/x
  3. Step 3: Cross multiply
    459,111.60x = 688,764.60 × 139,237.20
  4. Step 4: Simplify right side
    459,111.60x = 95,901,654,363.12
  5. Step 5: Solve for x
    x = 95,901,654,363.12/459,111.60
  6. Step 6: Final answer
    x = 208,885.28

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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.