Home / 42,749,891.60-64,166,827.80-21,208,816.40

Finding the Fourth Proportional to 42,749,891.60, 64,166,827.80 and 21,208,816.40

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Solution

The fourth proportional to 42,749,891.60, 64,166,827.80 and 21,208,816.40 is: 31,834,056.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,749,891.60 : 64,166,827.80 = 21,208,816.40 : x
  2. Step 2: Convert to fraction form
    42,749,891.60/64,166,827.80 = 21,208,816.40/x
  3. Step 3: Cross multiply
    42,749,891.60x = 64,166,827.80 × 21,208,816.40
  4. Step 4: Simplify right side
    42,749,891.60x = 1,360,902,469,780,615.75
  5. Step 5: Solve for x
    x = 1,360,902,469,780,615.75/42,749,891.60
  6. Step 6: Final answer
    x = 31,834,056.62

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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.