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Finding the Fourth Proportional to 90,689.92, 136,075.92 and 46,293.76

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Solution

The fourth proportional to 90,689.92, 136,075.92 and 46,293.76 is: 69,461.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,689.92 : 136,075.92 = 46,293.76 : x
  2. Step 2: Convert to fraction form
    90,689.92/136,075.92 = 46,293.76/x
  3. Step 3: Cross multiply
    90,689.92x = 136,075.92 × 46,293.76
  4. Step 4: Simplify right side
    90,689.92x = 6,299,465,982.26
  5. Step 5: Solve for x
    x = 6,299,465,982.26/90,689.92
  6. Step 6: Final answer
    x = 69,461.59

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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.