Home / 78,416,700.36-117,630,668.61-20,908,670.28

Finding the Fourth Proportional to 78,416,700.36, 117,630,668.61 and 20,908,670.28

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Solution

The fourth proportional to 78,416,700.36, 117,630,668.61 and 20,908,670.28 is: 31,364,503.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,416,700.36 : 117,630,668.61 = 20,908,670.28 : x
  2. Step 2: Convert to fraction form
    78,416,700.36/117,630,668.61 = 20,908,670.28/x
  3. Step 3: Cross multiply
    78,416,700.36x = 117,630,668.61 × 20,908,670.28
  4. Step 4: Simplify right side
    78,416,700.36x = 2,459,500,864,782,436
  5. Step 5: Solve for x
    x = 2,459,500,864,782,436/78,416,700.36
  6. Step 6: Final answer
    x = 31,364,503.40

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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.