Home / 145,514,120.80-218,271,181.20-72,742,133.20

Finding the Fourth Proportional to 145,514,120.80, 218,271,181.20 and 72,742,133.20

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Solution

The fourth proportional to 145,514,120.80, 218,271,181.20 and 72,742,133.20 is: 109,113,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,514,120.80 : 218,271,181.20 = 72,742,133.20 : x
  2. Step 2: Convert to fraction form
    145,514,120.80/218,271,181.20 = 72,742,133.20/x
  3. Step 3: Cross multiply
    145,514,120.80x = 218,271,181.20 × 72,742,133.20
  4. Step 4: Simplify right side
    145,514,120.80x = 15,877,511,336,571,736
  5. Step 5: Solve for x
    x = 15,877,511,336,571,736/145,514,120.80
  6. Step 6: Final answer
    x = 109,113,199.80

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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.