Home / 261,649,076.20-392,531,064.54-77,402,128.36

Finding the Fourth Proportional to 261,649,076.20, 392,531,064.54 and 77,402,128.36

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Solution

The fourth proportional to 261,649,076.20, 392,531,064.54 and 77,402,128.36 is: 116,120,187.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,649,076.20 : 392,531,064.54 = 77,402,128.36 : x
  2. Step 2: Convert to fraction form
    261,649,076.20/392,531,064.54 = 77,402,128.36/x
  3. Step 3: Cross multiply
    261,649,076.20x = 392,531,064.54 × 77,402,128.36
  4. Step 4: Simplify right side
    261,649,076.20x = 30,382,739,842,812,524
  5. Step 5: Solve for x
    x = 30,382,739,842,812,524/261,649,076.20
  6. Step 6: Final answer
    x = 116,120,187.71

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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.