Home / 368,854,085.81-509,019,134.42-212,218,051.20

Finding the Fourth Proportional to 368,854,085.81, 509,019,134.42 and 212,218,051.20

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Solution

The fourth proportional to 368,854,085.81, 509,019,134.42 and 212,218,051.20 is: 292,861,196.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,854,085.81 : 509,019,134.42 = 212,218,051.20 : x
  2. Step 2: Convert to fraction form
    368,854,085.81/509,019,134.42 = 212,218,051.20/x
  3. Step 3: Cross multiply
    368,854,085.81x = 509,019,134.42 × 212,218,051.20
  4. Step 4: Simplify right side
    368,854,085.81x = 108,023,048,730,653,792
  5. Step 5: Solve for x
    x = 108,023,048,730,653,792/368,854,085.81
  6. Step 6: Final answer
    x = 292,861,196.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.