Home / 138,238,645.34-207,356,547.74-79,909,208.64

Finding the Fourth Proportional to 138,238,645.34, 207,356,547.74 and 79,909,208.64

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Solution

The fourth proportional to 138,238,645.34, 207,356,547.74 and 79,909,208.64 is: 119,862,991.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,238,645.34 : 207,356,547.74 = 79,909,208.64 : x
  2. Step 2: Convert to fraction form
    138,238,645.34/207,356,547.74 = 79,909,208.64/x
  3. Step 3: Cross multiply
    138,238,645.34x = 207,356,547.74 × 79,909,208.64
  4. Step 4: Simplify right side
    138,238,645.34x = 16,569,697,636,225,782
  5. Step 5: Solve for x
    x = 16,569,697,636,225,782/138,238,645.34
  6. Step 6: Final answer
    x = 119,862,991.97

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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.