Home / 91,038.80-136,577.40-38,421.20

Finding the Fourth Proportional to 91,038.80, 136,577.40 and 38,421.20

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Solution

The fourth proportional to 91,038.80, 136,577.40 and 38,421.20 is: 57,639.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,038.80 : 136,577.40 = 38,421.20 : x
  2. Step 2: Convert to fraction form
    91,038.80/136,577.40 = 38,421.20/x
  3. Step 3: Cross multiply
    91,038.80x = 136,577.40 × 38,421.20
  4. Step 4: Simplify right side
    91,038.80x = 5,247,467,600.88
  5. Step 5: Solve for x
    x = 5,247,467,600.88/91,038.80
  6. Step 6: Final answer
    x = 57,639.90

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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.