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Finding the Fourth Proportional to 85,547.86, 128,343.64 and 35,611.36

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Solution

The fourth proportional to 85,547.86, 128,343.64 and 35,611.36 is: 53,426.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,547.86 : 128,343.64 = 35,611.36 : x
  2. Step 2: Convert to fraction form
    85,547.86/128,343.64 = 35,611.36/x
  3. Step 3: Cross multiply
    85,547.86x = 128,343.64 × 35,611.36
  4. Step 4: Simplify right side
    85,547.86x = 4,570,491,567.75
  5. Step 5: Solve for x
    x = 4,570,491,567.75/85,547.86
  6. Step 6: Final answer
    x = 53,426.14

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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.