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Finding the Fourth Proportional to 91,807,792.20, 128,700,970.20 and 91,807,792.20

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Solution

The fourth proportional to 91,807,792.20, 128,700,970.20 and 91,807,792.20 is: 128,700,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,807,792.20 : 128,700,970.20 = 91,807,792.20 : x
  2. Step 2: Convert to fraction form
    91,807,792.20/128,700,970.20 = 91,807,792.20/x
  3. Step 3: Cross multiply
    91,807,792.20x = 128,700,970.20 × 91,807,792.20
  4. Step 4: Simplify right side
    91,807,792.20x = 11,815,751,928,059,994
  5. Step 5: Solve for x
    x = 11,815,751,928,059,994/91,807,792.20
  6. Step 6: Final answer
    x = 128,700,970.20

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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.