Home / 387,686,211.50-581,534,382.55-128,901,431.74

Finding the Fourth Proportional to 387,686,211.50, 581,534,382.55 and 128,901,431.74

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Solution

The fourth proportional to 387,686,211.50, 581,534,382.55 and 128,901,431.74 is: 193,353,831.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,686,211.50 : 581,534,382.55 = 128,901,431.74 : x
  2. Step 2: Convert to fraction form
    387,686,211.50/581,534,382.55 = 128,901,431.74/x
  3. Step 3: Cross multiply
    387,686,211.50x = 581,534,382.55 × 128,901,431.74
  4. Step 4: Simplify right side
    387,686,211.50x = 74,960,614,516,731,856
  5. Step 5: Solve for x
    x = 74,960,614,516,731,856/387,686,211.50
  6. Step 6: Final answer
    x = 193,353,831.77

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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.