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Finding the Fourth Proportional to 209,953,802.40, 314,930,703.60 and 73,621,471.20

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Solution

The fourth proportional to 209,953,802.40, 314,930,703.60 and 73,621,471.20 is: 110,432,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,953,802.40 : 314,930,703.60 = 73,621,471.20 : x
  2. Step 2: Convert to fraction form
    209,953,802.40/314,930,703.60 = 73,621,471.20/x
  3. Step 3: Cross multiply
    209,953,802.40x = 314,930,703.60 × 73,621,471.20
  4. Step 4: Simplify right side
    209,953,802.40x = 23,185,661,725,083,140
  5. Step 5: Solve for x
    x = 23,185,661,725,083,140/209,953,802.40
  6. Step 6: Final answer
    x = 110,432,206.80

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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.