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Finding the Fourth Proportional to 90,489.94, 125,038.65 and 70,399.06

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Solution

The fourth proportional to 90,489.94, 125,038.65 and 70,399.06 is: 97,277.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,489.94 : 125,038.65 = 70,399.06 : x
  2. Step 2: Convert to fraction form
    90,489.94/125,038.65 = 70,399.06/x
  3. Step 3: Cross multiply
    90,489.94x = 125,038.65 × 70,399.06
  4. Step 4: Simplify right side
    90,489.94x = 8,802,603,423.67
  5. Step 5: Solve for x
    x = 8,802,603,423.67/90,489.94
  6. Step 6: Final answer
    x = 97,277.15

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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.