Home / 90,929.80-136,686.30-64,815.40

Finding the Fourth Proportional to 90,929.80, 136,686.30 and 64,815.40

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Solution

The fourth proportional to 90,929.80, 136,686.30 and 64,815.40 is: 97,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,929.80 : 136,686.30 = 64,815.40 : x
  2. Step 2: Convert to fraction form
    90,929.80/136,686.30 = 64,815.40/x
  3. Step 3: Cross multiply
    90,929.80x = 136,686.30 × 64,815.40
  4. Step 4: Simplify right side
    90,929.80x = 8,859,377,209.02
  5. Step 5: Solve for x
    x = 8,859,377,209.02/90,929.80
  6. Step 6: Final answer
    x = 97,430.95

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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.