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Finding the Fourth Proportional to 78,952,938.40, 118,628,473.20 and 50,212,842.40

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Solution

The fourth proportional to 78,952,938.40, 118,628,473.20 and 50,212,842.40 is: 75,445,866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,952,938.40 : 118,628,473.20 = 50,212,842.40 : x
  2. Step 2: Convert to fraction form
    78,952,938.40/118,628,473.20 = 50,212,842.40/x
  3. Step 3: Cross multiply
    78,952,938.40x = 118,628,473.20 × 50,212,842.40
  4. Step 4: Simplify right side
    78,952,938.40x = 5,956,672,828,944,224
  5. Step 5: Solve for x
    x = 5,956,672,828,944,224/78,952,938.40
  6. Step 6: Final answer
    x = 75,445,866.23

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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.