Home / 328,136,930.80-492,168,071.40-85,824,329.20

Finding the Fourth Proportional to 328,136,930.80, 492,168,071.40 and 85,824,329.20

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Solution

The fourth proportional to 328,136,930.80, 492,168,071.40 and 85,824,329.20 is: 128,726,731.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,136,930.80 : 492,168,071.40 = 85,824,329.20 : x
  2. Step 2: Convert to fraction form
    328,136,930.80/492,168,071.40 = 85,824,329.20/x
  3. Step 3: Cross multiply
    328,136,930.80x = 492,168,071.40 × 85,824,329.20
  4. Step 4: Simplify right side
    328,136,930.80x = 42,239,994,581,562,704
  5. Step 5: Solve for x
    x = 42,239,994,581,562,704/328,136,930.80
  6. Step 6: Final answer
    x = 128,726,731.49

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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.