Home / 100,456,418-138,621,371.28-60,778,731.80

Finding the Fourth Proportional to 100,456,418, 138,621,371.28 and 60,778,731.80

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Solution

The fourth proportional to 100,456,418, 138,621,371.28 and 60,778,731.80 is: 83,869,515.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,456,418 : 138,621,371.28 = 60,778,731.80 : x
  2. Step 2: Convert to fraction form
    100,456,418/138,621,371.28 = 60,778,731.80/x
  3. Step 3: Cross multiply
    100,456,418x = 138,621,371.28 × 60,778,731.80
  4. Step 4: Simplify right side
    100,456,418x = 8,425,231,146,775,342
  5. Step 5: Solve for x
    x = 8,425,231,146,775,342/100,456,418
  6. Step 6: Final answer
    x = 83,869,515.90

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1.5x scale

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.