Home / 85,407,972.21-128,085,462.15-30,813,460.65

Finding the Fourth Proportional to 85,407,972.21, 128,085,462.15 and 30,813,460.65

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Solution

The fourth proportional to 85,407,972.21, 128,085,462.15 and 30,813,460.65 is: 46,210,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,407,972.21 : 128,085,462.15 = 30,813,460.65 : x
  2. Step 2: Convert to fraction form
    85,407,972.21/128,085,462.15 = 30,813,460.65/x
  3. Step 3: Cross multiply
    85,407,972.21x = 128,085,462.15 × 30,813,460.65
  4. Step 4: Simplify right side
    85,407,972.21x = 3,946,756,347,796,089.50
  5. Step 5: Solve for x
    x = 3,946,756,347,796,089.50/85,407,972.21
  6. Step 6: Final answer
    x = 46,210,631.70

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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.