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Finding the Fourth Proportional to 66,798,813.60, 100,198,220.40 and 51,663,607.20

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Solution

The fourth proportional to 66,798,813.60, 100,198,220.40 and 51,663,607.20 is: 77,495,410.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,798,813.60 : 100,198,220.40 = 51,663,607.20 : x
  2. Step 2: Convert to fraction form
    66,798,813.60/100,198,220.40 = 51,663,607.20/x
  3. Step 3: Cross multiply
    66,798,813.60x = 100,198,220.40 × 51,663,607.20
  4. Step 4: Simplify right side
    66,798,813.60x = 5,176,601,500,884,627
  5. Step 5: Solve for x
    x = 5,176,601,500,884,627/66,798,813.60
  6. Step 6: Final answer
    x = 77,495,410.80

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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.