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Finding the Fourth Proportional to 154,528, 213,281.59 and 90,902.09

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Solution

The fourth proportional to 154,528, 213,281.59 and 90,902.09 is: 125,464.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,528 : 213,281.59 = 90,902.09 : x
  2. Step 2: Convert to fraction form
    154,528/213,281.59 = 90,902.09/x
  3. Step 3: Cross multiply
    154,528x = 213,281.59 × 90,902.09
  4. Step 4: Simplify right side
    154,528x = 19,387,742,289.52
  5. Step 5: Solve for x
    x = 19,387,742,289.52/154,528
  6. Step 6: Final answer
    x = 125,464.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.