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Finding the Fourth Proportional to 155,967.72, 215,236.10 and 84,347.74

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Solution

The fourth proportional to 155,967.72, 215,236.10 and 84,347.74 is: 116,400.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,967.72 : 215,236.10 = 84,347.74 : x
  2. Step 2: Convert to fraction form
    155,967.72/215,236.10 = 84,347.74/x
  3. Step 3: Cross multiply
    155,967.72x = 215,236.10 × 84,347.74
  4. Step 4: Simplify right side
    155,967.72x = 18,154,678,541.42
  5. Step 5: Solve for x
    x = 18,154,678,541.42/155,967.72
  6. Step 6: Final answer
    x = 116,400.23

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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.