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Finding the Fourth Proportional to 155,710.81, 214,880.91 and 84,090.84

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Solution

The fourth proportional to 155,710.81, 214,880.91 and 84,090.84 is: 116,045.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,710.81 : 214,880.91 = 84,090.84 : x
  2. Step 2: Convert to fraction form
    155,710.81/214,880.91 = 84,090.84/x
  3. Step 3: Cross multiply
    155,710.81x = 214,880.91 × 84,090.84
  4. Step 4: Simplify right side
    155,710.81x = 18,069,516,221.86
  5. Step 5: Solve for x
    x = 18,069,516,221.86/155,710.81
  6. Step 6: Final answer
    x = 116,045.35

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1.5x scale

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.