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Finding the Fourth Proportional to 127,879,337.70, 191,819,006.55 and 47,089,808.10

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Solution

The fourth proportional to 127,879,337.70, 191,819,006.55 and 47,089,808.10 is: 70,634,712.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,879,337.70 : 191,819,006.55 = 47,089,808.10 : x
  2. Step 2: Convert to fraction form
    127,879,337.70/191,819,006.55 = 47,089,808.10/x
  3. Step 3: Cross multiply
    127,879,337.70x = 191,819,006.55 × 47,089,808.10
  4. Step 4: Simplify right side
    127,879,337.70x = 9,032,720,208,372,144
  5. Step 5: Solve for x
    x = 9,032,720,208,372,144/127,879,337.70
  6. Step 6: Final answer
    x = 70,634,712.15

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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.