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Finding the Fourth Proportional to 82,703,485.80, 124,055,228.70 and 81,428,027.40

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Solution

The fourth proportional to 82,703,485.80, 124,055,228.70 and 81,428,027.40 is: 122,142,041.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,703,485.80 : 124,055,228.70 = 81,428,027.40 : x
  2. Step 2: Convert to fraction form
    82,703,485.80/124,055,228.70 = 81,428,027.40/x
  3. Step 3: Cross multiply
    82,703,485.80x = 124,055,228.70 × 81,428,027.40
  4. Step 4: Simplify right side
    82,703,485.80x = 10,101,572,561,696,868
  5. Step 5: Solve for x
    x = 10,101,572,561,696,868/82,703,485.80
  6. Step 6: Final answer
    x = 122,142,041.10

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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.