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Finding the Fourth Proportional to 128,999,211.60, 181,109,079.60 and 128,999,211.60

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Solution

The fourth proportional to 128,999,211.60, 181,109,079.60 and 128,999,211.60 is: 181,109,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,999,211.60 : 181,109,079.60 = 128,999,211.60 : x
  2. Step 2: Convert to fraction form
    128,999,211.60/181,109,079.60 = 128,999,211.60/x
  3. Step 3: Cross multiply
    128,999,211.60x = 181,109,079.60 × 128,999,211.60
  4. Step 4: Simplify right side
    128,999,211.60x = 23,362,928,482,001,640
  5. Step 5: Solve for x
    x = 23,362,928,482,001,640/128,999,211.60
  6. Step 6: Final answer
    x = 181,109,079.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.