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Finding the Fourth Proportional to 156,298.99, 215,692.84 and 84,679.01

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Solution

The fourth proportional to 156,298.99, 215,692.84 and 84,679.01 is: 116,857.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,298.99 : 215,692.84 = 84,679.01 : x
  2. Step 2: Convert to fraction form
    156,298.99/215,692.84 = 84,679.01/x
  3. Step 3: Cross multiply
    156,298.99x = 215,692.84 × 84,679.01
  4. Step 4: Simplify right side
    156,298.99x = 18,264,656,728.47
  5. Step 5: Solve for x
    x = 18,264,656,728.47/156,298.99
  6. Step 6: Final answer
    x = 116,857.16

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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.