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Finding the Fourth Proportional to 35,361,762.40, 53,042,643.60 and 12,643,400.80

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Solution

The fourth proportional to 35,361,762.40, 53,042,643.60 and 12,643,400.80 is: 18,965,101.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,361,762.40 : 53,042,643.60 = 12,643,400.80 : x
  2. Step 2: Convert to fraction form
    35,361,762.40/53,042,643.60 = 12,643,400.80/x
  3. Step 3: Cross multiply
    35,361,762.40x = 53,042,643.60 × 12,643,400.80
  4. Step 4: Simplify right side
    35,361,762.40x = 670,639,402,526,355
  5. Step 5: Solve for x
    x = 670,639,402,526,355/35,361,762.40
  6. Step 6: Final answer
    x = 18,965,101.20

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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.