Home / 78,343,670.80-117,515,506.20-70,407,485.20

Finding the Fourth Proportional to 78,343,670.80, 117,515,506.20 and 70,407,485.20

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Solution

The fourth proportional to 78,343,670.80, 117,515,506.20 and 70,407,485.20 is: 105,611,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,343,670.80 : 117,515,506.20 = 70,407,485.20 : x
  2. Step 2: Convert to fraction form
    78,343,670.80/117,515,506.20 = 70,407,485.20/x
  3. Step 3: Cross multiply
    78,343,670.80x = 117,515,506.20 × 70,407,485.20
  4. Step 4: Simplify right side
    78,343,670.80x = 8,273,971,263,547,009
  5. Step 5: Solve for x
    x = 8,273,971,263,547,009/78,343,670.80
  6. Step 6: Final answer
    x = 105,611,227.80

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1.5x scale

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.