Home / 129,437,018.28-178,621,902.06-70,699,665.78

Finding the Fourth Proportional to 129,437,018.28, 178,621,902.06 and 70,699,665.78

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Solution

The fourth proportional to 129,437,018.28, 178,621,902.06 and 70,699,665.78 is: 97,564,892.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,437,018.28 : 178,621,902.06 = 70,699,665.78 : x
  2. Step 2: Convert to fraction form
    129,437,018.28/178,621,902.06 = 70,699,665.78/x
  3. Step 3: Cross multiply
    129,437,018.28x = 178,621,902.06 × 70,699,665.78
  4. Step 4: Simplify right side
    129,437,018.28x = 12,628,508,776,629,894
  5. Step 5: Solve for x
    x = 12,628,508,776,629,894/129,437,018.28
  6. Step 6: Final answer
    x = 97,564,892.52

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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.