Home / 85,675.16-128,539.01-38,330.10

Finding the Fourth Proportional to 85,675.16, 128,539.01 and 38,330.10

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Solution

The fourth proportional to 85,675.16, 128,539.01 and 38,330.10 is: 57,506.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,675.16 : 128,539.01 = 38,330.10 : x
  2. Step 2: Convert to fraction form
    85,675.16/128,539.01 = 38,330.10/x
  3. Step 3: Cross multiply
    85,675.16x = 128,539.01 × 38,330.10
  4. Step 4: Simplify right side
    85,675.16x = 4,926,913,203.03
  5. Step 5: Solve for x
    x = 4,926,913,203.03/85,675.16
  6. Step 6: Final answer
    x = 57,506.90

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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.