Home / 100,330.95-149,612.15-99,431.58

Finding the Fourth Proportional to 100,330.95, 149,612.15 and 99,431.58

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Solution

The fourth proportional to 100,330.95, 149,612.15 and 99,431.58 is: 148,271.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,330.95 : 149,612.15 = 99,431.58 : x
  2. Step 2: Convert to fraction form
    100,330.95/149,612.15 = 99,431.58/x
  3. Step 3: Cross multiply
    100,330.95x = 149,612.15 × 99,431.58
  4. Step 4: Simplify right side
    100,330.95x = 14,876,172,461.70
  5. Step 5: Solve for x
    x = 14,876,172,461.70/100,330.95
  6. Step 6: Final answer
    x = 148,271.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.