Home / 90,746.80-136,120.20-86,907.40

Finding the Fourth Proportional to 90,746.80, 136,120.20 and 86,907.40

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Solution

The fourth proportional to 90,746.80, 136,120.20 and 86,907.40 is: 130,361.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,746.80 : 136,120.20 = 86,907.40 : x
  2. Step 2: Convert to fraction form
    90,746.80/136,120.20 = 86,907.40/x
  3. Step 3: Cross multiply
    90,746.80x = 136,120.20 × 86,907.40
  4. Step 4: Simplify right side
    90,746.80x = 11,829,852,669.48
  5. Step 5: Solve for x
    x = 11,829,852,669.48/90,746.80
  6. Step 6: Final answer
    x = 130,361.10

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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.