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Finding the Fourth Proportional to 85,526.55, 128,310.68 and 60,275.30

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Solution

The fourth proportional to 85,526.55, 128,310.68 and 60,275.30 is: 90,427.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,526.55 : 128,310.68 = 60,275.30 : x
  2. Step 2: Convert to fraction form
    85,526.55/128,310.68 = 60,275.30/x
  3. Step 3: Cross multiply
    85,526.55x = 128,310.68 × 60,275.30
  4. Step 4: Simplify right side
    85,526.55x = 7,733,964,239.34
  5. Step 5: Solve for x
    x = 7,733,964,239.34/85,526.55
  6. Step 6: Final answer
    x = 90,427.64

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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.