Home / 81,128.40-121,567.17-63,316.83

Finding the Fourth Proportional to 81,128.40, 121,567.17 and 63,316.83

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Solution

The fourth proportional to 81,128.40, 121,567.17 and 63,316.83 is: 94,877.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,128.40 : 121,567.17 = 63,316.83 : x
  2. Step 2: Convert to fraction form
    81,128.40/121,567.17 = 63,316.83/x
  3. Step 3: Cross multiply
    81,128.40x = 121,567.17 × 63,316.83
  4. Step 4: Simplify right side
    81,128.40x = 7,697,247,836.47
  5. Step 5: Solve for x
    x = 7,697,247,836.47/81,128.40
  6. Step 6: Final answer
    x = 94,877.35

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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.