Home / 143,775,365.20-215,663,047.80-86,238,019.60

Finding the Fourth Proportional to 143,775,365.20, 215,663,047.80 and 86,238,019.60

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Solution

The fourth proportional to 143,775,365.20, 215,663,047.80 and 86,238,019.60 is: 129,357,029.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,775,365.20 : 215,663,047.80 = 86,238,019.60 : x
  2. Step 2: Convert to fraction form
    143,775,365.20/215,663,047.80 = 86,238,019.60/x
  3. Step 3: Cross multiply
    143,775,365.20x = 215,663,047.80 × 86,238,019.60
  4. Step 4: Simplify right side
    143,775,365.20x = 18,598,354,143,172,136
  5. Step 5: Solve for x
    x = 18,598,354,143,172,136/143,775,365.20
  6. Step 6: Final answer
    x = 129,357,029.40

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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.