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Finding the Fourth Proportional to 142,745.10, 214,117.65 and 42,920.70

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Solution

The fourth proportional to 142,745.10, 214,117.65 and 42,920.70 is: 64,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,745.10 : 214,117.65 = 42,920.70 : x
  2. Step 2: Convert to fraction form
    142,745.10/214,117.65 = 42,920.70/x
  3. Step 3: Cross multiply
    142,745.10x = 214,117.65 × 42,920.70
  4. Step 4: Simplify right side
    142,745.10x = 9,190,079,420.36
  5. Step 5: Solve for x
    x = 9,190,079,420.36/142,745.10
  6. Step 6: Final answer
    x = 64,381.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.