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Finding the Fourth Proportional to 112,945.20, 169,417.80 and 42,820.80

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Solution

The fourth proportional to 112,945.20, 169,417.80 and 42,820.80 is: 64,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,945.20 : 169,417.80 = 42,820.80 : x
  2. Step 2: Convert to fraction form
    112,945.20/169,417.80 = 42,820.80/x
  3. Step 3: Cross multiply
    112,945.20x = 169,417.80 × 42,820.80
  4. Step 4: Simplify right side
    112,945.20x = 7,254,605,730.24
  5. Step 5: Solve for x
    x = 7,254,605,730.24/112,945.20
  6. Step 6: Final answer
    x = 64,231.20

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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.