Home / 78,807,795.60-118,211,693.40-21,298,443.60

Finding the Fourth Proportional to 78,807,795.60, 118,211,693.40 and 21,298,443.60

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Solution

The fourth proportional to 78,807,795.60, 118,211,693.40 and 21,298,443.60 is: 31,947,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807,795.60 : 118,211,693.40 = 21,298,443.60 : x
  2. Step 2: Convert to fraction form
    78,807,795.60/118,211,693.40 = 21,298,443.60/x
  3. Step 3: Cross multiply
    78,807,795.60x = 118,211,693.40 × 21,298,443.60
  4. Step 4: Simplify right side
    78,807,795.60x = 2,517,725,084,740,392.50
  5. Step 5: Solve for x
    x = 2,517,725,084,740,392.50/78,807,795.60
  6. Step 6: Final answer
    x = 31,947,665.40

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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.