Home / 100,420.02-138,574.95-55,096.98

Finding the Fourth Proportional to 100,420.02, 138,574.95 and 55,096.98

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Solution

The fourth proportional to 100,420.02, 138,574.95 and 55,096.98 is: 76,031.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,420.02 : 138,574.95 = 55,096.98 : x
  2. Step 2: Convert to fraction form
    100,420.02/138,574.95 = 55,096.98/x
  3. Step 3: Cross multiply
    100,420.02x = 138,574.95 × 55,096.98
  4. Step 4: Simplify right side
    100,420.02x = 7,635,061,248.65
  5. Step 5: Solve for x
    x = 7,635,061,248.65/100,420.02
  6. Step 6: Final answer
    x = 76,031.27

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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.