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Finding the Fourth Proportional to 153,840.68, 212,268.34 and 88,416.80

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Solution

The fourth proportional to 153,840.68, 212,268.34 and 88,416.80 is: 121,996.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,840.68 : 212,268.34 = 88,416.80 : x
  2. Step 2: Convert to fraction form
    153,840.68/212,268.34 = 88,416.80/x
  3. Step 3: Cross multiply
    153,840.68x = 212,268.34 × 88,416.80
  4. Step 4: Simplify right side
    153,840.68x = 18,768,087,364.11
  5. Step 5: Solve for x
    x = 18,768,087,364.11/153,840.68
  6. Step 6: Final answer
    x = 121,996.91

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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.