Home / 90,450.64-135,017.15-83,780.26

Finding the Fourth Proportional to 90,450.64, 135,017.15 and 83,780.26

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Solution

The fourth proportional to 90,450.64, 135,017.15 and 83,780.26 is: 125,060.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,450.64 : 135,017.15 = 83,780.26 : x
  2. Step 2: Convert to fraction form
    90,450.64/135,017.15 = 83,780.26/x
  3. Step 3: Cross multiply
    90,450.64x = 135,017.15 × 83,780.26
  4. Step 4: Simplify right side
    90,450.64x = 11,311,771,931.46
  5. Step 5: Solve for x
    x = 11,311,771,931.46/90,450.64
  6. Step 6: Final answer
    x = 125,060.16

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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.