Home / 90,756.64-136,135.02-28,432

Finding the Fourth Proportional to 90,756.64, 136,135.02 and 28,432

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Solution

The fourth proportional to 90,756.64, 136,135.02 and 28,432 is: 42,648.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,756.64 : 136,135.02 = 28,432 : x
  2. Step 2: Convert to fraction form
    90,756.64/136,135.02 = 28,432/x
  3. Step 3: Cross multiply
    90,756.64x = 136,135.02 × 28,432
  4. Step 4: Simplify right side
    90,756.64x = 3,870,590,888.64
  5. Step 5: Solve for x
    x = 3,870,590,888.64/90,756.64
  6. Step 6: Final answer
    x = 42,648.02

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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.