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Finding the Fourth Proportional to 128,590.59, 177,414.01 and 83,303.29

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Solution

The fourth proportional to 128,590.59, 177,414.01 and 83,303.29 is: 114,931.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,590.59 : 177,414.01 = 83,303.29 : x
  2. Step 2: Convert to fraction form
    128,590.59/177,414.01 = 83,303.29/x
  3. Step 3: Cross multiply
    128,590.59x = 177,414.01 × 83,303.29
  4. Step 4: Simplify right side
    128,590.59x = 14,779,171,050.99
  5. Step 5: Solve for x
    x = 14,779,171,050.99/128,590.59
  6. Step 6: Final answer
    x = 114,931.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.