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Finding the Fourth Proportional to 85,526.40, 128,289.60 and 63,437.70

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Solution

The fourth proportional to 85,526.40, 128,289.60 and 63,437.70 is: 95,156.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,526.40 : 128,289.60 = 63,437.70 : x
  2. Step 2: Convert to fraction form
    85,526.40/128,289.60 = 63,437.70/x
  3. Step 3: Cross multiply
    85,526.40x = 128,289.60 × 63,437.70
  4. Step 4: Simplify right side
    85,526.40x = 8,138,397,157.92
  5. Step 5: Solve for x
    x = 8,138,397,157.92/85,526.40
  6. Step 6: Final answer
    x = 95,156.55

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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.