Home / 128,915,381.20-193,373,071.80-99,690,062.80

Finding the Fourth Proportional to 128,915,381.20, 193,373,071.80 and 99,690,062.80

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Solution

The fourth proportional to 128,915,381.20, 193,373,071.80 and 99,690,062.80 is: 149,535,094.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,915,381.20 : 193,373,071.80 = 99,690,062.80 : x
  2. Step 2: Convert to fraction form
    128,915,381.20/193,373,071.80 = 99,690,062.80/x
  3. Step 3: Cross multiply
    128,915,381.20x = 193,373,071.80 × 99,690,062.80
  4. Step 4: Simplify right side
    128,915,381.20x = 19,277,373,671,570,908
  5. Step 5: Solve for x
    x = 19,277,373,671,570,908/128,915,381.20
  6. Step 6: Final answer
    x = 149,535,094.20

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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.