Home / 138,602,898.90-191,289,095.37-79,078,850.10

Finding the Fourth Proportional to 138,602,898.90, 191,289,095.37 and 79,078,850.10

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Solution

The fourth proportional to 138,602,898.90, 191,289,095.37 and 79,078,850.10 is: 109,138,566.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,602,898.90 : 191,289,095.37 = 79,078,850.10 : x
  2. Step 2: Convert to fraction form
    138,602,898.90/191,289,095.37 = 79,078,850.10/x
  3. Step 3: Cross multiply
    138,602,898.90x = 191,289,095.37 × 79,078,850.10
  4. Step 4: Simplify right side
    138,602,898.90x = 15,126,921,698,528,834
  5. Step 5: Solve for x
    x = 15,126,921,698,528,834/138,602,898.90
  6. Step 6: Final answer
    x = 109,138,566.50

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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.