Home / 90,603.20-135,904.80-56,923.40

Finding the Fourth Proportional to 90,603.20, 135,904.80 and 56,923.40

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Solution

The fourth proportional to 90,603.20, 135,904.80 and 56,923.40 is: 85,385.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,603.20 : 135,904.80 = 56,923.40 : x
  2. Step 2: Convert to fraction form
    90,603.20/135,904.80 = 56,923.40/x
  3. Step 3: Cross multiply
    90,603.20x = 135,904.80 × 56,923.40
  4. Step 4: Simplify right side
    90,603.20x = 7,736,163,292.32
  5. Step 5: Solve for x
    x = 7,736,163,292.32/90,603.20
  6. Step 6: Final answer
    x = 85,385.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.