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Finding the Fourth Proportional to 85,363.65, 128,045.48 and 57,370.05

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Solution

The fourth proportional to 85,363.65, 128,045.48 and 57,370.05 is: 86,055.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,363.65 : 128,045.48 = 57,370.05 : x
  2. Step 2: Convert to fraction form
    85,363.65/128,045.48 = 57,370.05/x
  3. Step 3: Cross multiply
    85,363.65x = 128,045.48 × 57,370.05
  4. Step 4: Simplify right side
    85,363.65x = 7,345,975,303.02
  5. Step 5: Solve for x
    x = 7,345,975,303.02/85,363.65
  6. Step 6: Final answer
    x = 86,055.08

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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.