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Finding the Fourth Proportional to 155,079.86, 214,056.62 and 90,566.50

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Solution

The fourth proportional to 155,079.86, 214,056.62 and 90,566.50 is: 125,008.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,079.86 : 214,056.62 = 90,566.50 : x
  2. Step 2: Convert to fraction form
    155,079.86/214,056.62 = 90,566.50/x
  3. Step 3: Cross multiply
    155,079.86x = 214,056.62 × 90,566.50
  4. Step 4: Simplify right side
    155,079.86x = 19,386,358,875.23
  5. Step 5: Solve for x
    x = 19,386,358,875.23/155,079.86
  6. Step 6: Final answer
    x = 125,008.88

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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.