Home / 78,021,987.41-117,075,828.62-45,272,600.08

Finding the Fourth Proportional to 78,021,987.41, 117,075,828.62 and 45,272,600.08

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Solution

The fourth proportional to 78,021,987.41, 117,075,828.62 and 45,272,600.08 is: 67,933,762.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,021,987.41 : 117,075,828.62 = 45,272,600.08 : x
  2. Step 2: Convert to fraction form
    78,021,987.41/117,075,828.62 = 45,272,600.08/x
  3. Step 3: Cross multiply
    78,021,987.41x = 117,075,828.62 × 45,272,600.08
  4. Step 4: Simplify right side
    78,021,987.41x = 5,300,327,167,968,370
  5. Step 5: Solve for x
    x = 5,300,327,167,968,370/78,021,987.41
  6. Step 6: Final answer
    x = 67,933,762.57

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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.