Home / 138,448,503.72-191,051,205.12-75,712,221.72

Finding the Fourth Proportional to 138,448,503.72, 191,051,205.12 and 75,712,221.72

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Solution

The fourth proportional to 138,448,503.72, 191,051,205.12 and 75,712,221.72 is: 104,478,638.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,448,503.72 : 191,051,205.12 = 75,712,221.72 : x
  2. Step 2: Convert to fraction form
    138,448,503.72/191,051,205.12 = 75,712,221.72/x
  3. Step 3: Cross multiply
    138,448,503.72x = 191,051,205.12 × 75,712,221.72
  4. Step 4: Simplify right side
    138,448,503.72x = 14,464,911,201,918,640
  5. Step 5: Solve for x
    x = 14,464,911,201,918,640/138,448,503.72
  6. Step 6: Final answer
    x = 104,478,638.72

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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.