Home / 287,430,763.60-431,146,145.40-105,640,325.20

Finding the Fourth Proportional to 287,430,763.60, 431,146,145.40 and 105,640,325.20

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Solution

The fourth proportional to 287,430,763.60, 431,146,145.40 and 105,640,325.20 is: 158,460,487.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,430,763.60 : 431,146,145.40 = 105,640,325.20 : x
  2. Step 2: Convert to fraction form
    287,430,763.60/431,146,145.40 = 105,640,325.20/x
  3. Step 3: Cross multiply
    287,430,763.60x = 431,146,145.40 × 105,640,325.20
  4. Step 4: Simplify right side
    287,430,763.60x = 45,546,419,008,782,480
  5. Step 5: Solve for x
    x = 45,546,419,008,782,480/287,430,763.60
  6. Step 6: Final answer
    x = 158,460,487.80

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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.