Home / 85,810,268.80-128,715,403.20-78,755,881.60

Finding the Fourth Proportional to 85,810,268.80, 128,715,403.20 and 78,755,881.60

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Solution

The fourth proportional to 85,810,268.80, 128,715,403.20 and 78,755,881.60 is: 118,133,822.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,810,268.80 : 128,715,403.20 = 78,755,881.60 : x
  2. Step 2: Convert to fraction form
    85,810,268.80/128,715,403.20 = 78,755,881.60/x
  3. Step 3: Cross multiply
    85,810,268.80x = 128,715,403.20 × 78,755,881.60
  4. Step 4: Simplify right side
    85,810,268.80x = 10,137,095,054,515,460
  5. Step 5: Solve for x
    x = 10,137,095,054,515,460/85,810,268.80
  6. Step 6: Final answer
    x = 118,133,822.40

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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.