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Finding the Fourth Proportional to 156,077.49, 215,387.49 and 84,457.51

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Solution

The fourth proportional to 156,077.49, 215,387.49 and 84,457.51 is: 116,551.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,077.49 : 215,387.49 = 84,457.51 : x
  2. Step 2: Convert to fraction form
    156,077.49/215,387.49 = 84,457.51/x
  3. Step 3: Cross multiply
    156,077.49x = 215,387.49 × 84,457.51
  4. Step 4: Simplify right side
    156,077.49x = 18,191,091,090.55
  5. Step 5: Solve for x
    x = 18,191,091,090.55/156,077.49
  6. Step 6: Final answer
    x = 116,551.66

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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.