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Finding the Fourth Proportional to 84,572,931.20, 118,640,982.40 and 84,572,931.20

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Solution

The fourth proportional to 84,572,931.20, 118,640,982.40 and 84,572,931.20 is: 118,640,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,572,931.20 : 118,640,982.40 = 84,572,931.20 : x
  2. Step 2: Convert to fraction form
    84,572,931.20/118,640,982.40 = 84,572,931.20/x
  3. Step 3: Cross multiply
    84,572,931.20x = 118,640,982.40 × 84,572,931.20
  4. Step 4: Simplify right side
    84,572,931.20x = 10,033,815,642,015,612
  5. Step 5: Solve for x
    x = 10,033,815,642,015,612/84,572,931.20
  6. Step 6: Final answer
    x = 118,640,982.40

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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.