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Finding the Fourth Proportional to 58,459,742.80, 81,978,009.20 and 58,459,742.80

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Solution

The fourth proportional to 58,459,742.80, 81,978,009.20 and 58,459,742.80 is: 81,978,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,459,742.80 : 81,978,009.20 = 58,459,742.80 : x
  2. Step 2: Convert to fraction form
    58,459,742.80/81,978,009.20 = 58,459,742.80/x
  3. Step 3: Cross multiply
    58,459,742.80x = 81,978,009.20 × 58,459,742.80
  4. Step 4: Simplify right side
    58,459,742.80x = 4,792,413,333,088,034
  5. Step 5: Solve for x
    x = 4,792,413,333,088,034/58,459,742.80
  6. Step 6: Final answer
    x = 81,978,009.20

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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.