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Finding the Fourth Proportional to 560,043.60, 840,063.66 and 139,319.48

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Solution

The fourth proportional to 560,043.60, 840,063.66 and 139,319.48 is: 208,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,043.60 : 840,063.66 = 139,319.48 : x
  2. Step 2: Convert to fraction form
    560,043.60/840,063.66 = 139,319.48/x
  3. Step 3: Cross multiply
    560,043.60x = 840,063.66 × 139,319.48
  4. Step 4: Simplify right side
    560,043.60x = 117,037,228,077.78
  5. Step 5: Solve for x
    x = 117,037,228,077.78/560,043.60
  6. Step 6: Final answer
    x = 208,978.78

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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.