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Finding the Fourth Proportional to 90,845,648.40, 136,268,472.60 and 83,830,627.20

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Solution

The fourth proportional to 90,845,648.40, 136,268,472.60 and 83,830,627.20 is: 125,745,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,845,648.40 : 136,268,472.60 = 83,830,627.20 : x
  2. Step 2: Convert to fraction form
    90,845,648.40/136,268,472.60 = 83,830,627.20/x
  3. Step 3: Cross multiply
    90,845,648.40x = 136,268,472.60 × 83,830,627.20
  4. Step 4: Simplify right side
    90,845,648.40x = 11,423,471,525,644,014
  5. Step 5: Solve for x
    x = 11,423,471,525,644,014/90,845,648.40
  6. Step 6: Final answer
    x = 125,745,940.80

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1.5x scale

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.