Home / 78,725,961.78-118,080,969.52-21,224,045.58

Finding the Fourth Proportional to 78,725,961.78, 118,080,969.52 and 21,224,045.58

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Solution

The fourth proportional to 78,725,961.78, 118,080,969.52 and 21,224,045.58 is: 31,833,918.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,725,961.78 : 118,080,969.52 = 21,224,045.58 : x
  2. Step 2: Convert to fraction form
    78,725,961.78/118,080,969.52 = 21,224,045.58/x
  3. Step 3: Cross multiply
    78,725,961.78x = 118,080,969.52 × 21,224,045.58
  4. Step 4: Simplify right side
    78,725,961.78x = 2,506,155,879,223,070.50
  5. Step 5: Solve for x
    x = 2,506,155,879,223,070.50/78,725,961.78
  6. Step 6: Final answer
    x = 31,833,918.86

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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.