Home / 78,416,703.36-117,630,673.12-20,908,673.28

Finding the Fourth Proportional to 78,416,703.36, 117,630,673.12 and 20,908,673.28

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Solution

The fourth proportional to 78,416,703.36, 117,630,673.12 and 20,908,673.28 is: 31,364,507.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,416,703.36 : 117,630,673.12 = 20,908,673.28 : x
  2. Step 2: Convert to fraction form
    78,416,703.36/117,630,673.12 = 20,908,673.28/x
  3. Step 3: Cross multiply
    78,416,703.36x = 117,630,673.12 × 20,908,673.28
  4. Step 4: Simplify right side
    78,416,703.36x = 2,459,501,311,972,558.50
  5. Step 5: Solve for x
    x = 2,459,501,311,972,558.50/78,416,703.36
  6. Step 6: Final answer
    x = 31,364,507.90

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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.