Home / 390,739,875.24-585,985,375.28-128,363,523.15

Finding the Fourth Proportional to 390,739,875.24, 585,985,375.28 and 128,363,523.15

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Solution

The fourth proportional to 390,739,875.24, 585,985,375.28 and 128,363,523.15 is: 192,504,405.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,739,875.24 : 585,985,375.28 = 128,363,523.15 : x
  2. Step 2: Convert to fraction form
    390,739,875.24/585,985,375.28 = 128,363,523.15/x
  3. Step 3: Cross multiply
    390,739,875.24x = 585,985,375.28 × 128,363,523.15
  4. Step 4: Simplify right side
    390,739,875.24x = 75,219,147,287,834,080
  5. Step 5: Solve for x
    x = 75,219,147,287,834,080/390,739,875.24
  6. Step 6: Final answer
    x = 192,504,405.24

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.