Home / 78,416,698.86-117,630,666.36-20,908,668.78

Finding the Fourth Proportional to 78,416,698.86, 117,630,666.36 and 20,908,668.78

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Solution

The fourth proportional to 78,416,698.86, 117,630,666.36 and 20,908,668.78 is: 31,364,501.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,416,698.86 : 117,630,666.36 = 20,908,668.78 : x
  2. Step 2: Convert to fraction form
    78,416,698.86/117,630,666.36 = 20,908,668.78/x
  3. Step 3: Cross multiply
    78,416,698.86x = 117,630,666.36 × 20,908,668.78
  4. Step 4: Simplify right side
    78,416,698.86x = 2,459,500,641,291,928.50
  5. Step 5: Solve for x
    x = 2,459,500,641,291,928.50/78,416,698.86
  6. Step 6: Final answer
    x = 31,364,501.15

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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.