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Finding the Fourth Proportional to 356,780.60, 535,168.47 and 86,905.52

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Solution

The fourth proportional to 356,780.60, 535,168.47 and 86,905.52 is: 130,357.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,780.60 : 535,168.47 = 86,905.52 : x
  2. Step 2: Convert to fraction form
    356,780.60/535,168.47 = 86,905.52/x
  3. Step 3: Cross multiply
    356,780.60x = 535,168.47 × 86,905.52
  4. Step 4: Simplify right side
    356,780.60x = 46,509,094,172.95
  5. Step 5: Solve for x
    x = 46,509,094,172.95/356,780.60
  6. Step 6: Final answer
    x = 130,357.69

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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.