Home / 78,349,419.60-117,524,129.40-47,693,317.20

Finding the Fourth Proportional to 78,349,419.60, 117,524,129.40 and 47,693,317.20

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Solution

The fourth proportional to 78,349,419.60, 117,524,129.40 and 47,693,317.20 is: 71,539,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349,419.60 : 117,524,129.40 = 47,693,317.20 : x
  2. Step 2: Convert to fraction form
    78,349,419.60/117,524,129.40 = 47,693,317.20/x
  3. Step 3: Cross multiply
    78,349,419.60x = 117,524,129.40 × 47,693,317.20
  4. Step 4: Simplify right side
    78,349,419.60x = 5,605,115,582,128,046
  5. Step 5: Solve for x
    x = 5,605,115,582,128,046/78,349,419.60
  6. Step 6: Final answer
    x = 71,539,975.80

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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.