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Finding the Fourth Proportional to 145,749.70, 201,141.39 and 88,390.90

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Solution

The fourth proportional to 145,749.70, 201,141.39 and 88,390.90 is: 121,983.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,749.70 : 201,141.39 = 88,390.90 : x
  2. Step 2: Convert to fraction form
    145,749.70/201,141.39 = 88,390.90/x
  3. Step 3: Cross multiply
    145,749.70x = 201,141.39 × 88,390.90
  4. Step 4: Simplify right side
    145,749.70x = 17,779,068,489.35
  5. Step 5: Solve for x
    x = 17,779,068,489.35/145,749.70
  6. Step 6: Final answer
    x = 121,983.57

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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.