Home / 129,085,672.76-178,133,031.35-70,347,076.78

Finding the Fourth Proportional to 129,085,672.76, 178,133,031.35 and 70,347,076.78

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Solution

The fourth proportional to 129,085,672.76, 178,133,031.35 and 70,347,076.78 is: 97,076,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,085,672.76 : 178,133,031.35 = 70,347,076.78 : x
  2. Step 2: Convert to fraction form
    129,085,672.76/178,133,031.35 = 70,347,076.78/x
  3. Step 3: Cross multiply
    129,085,672.76x = 178,133,031.35 × 70,347,076.78
  4. Step 4: Simplify right side
    129,085,672.76x = 12,531,138,033,431,710
  5. Step 5: Solve for x
    x = 12,531,138,033,431,710/129,085,672.76
  6. Step 6: Final answer
    x = 97,076,133.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.