Home / 219,017.40-302,308.65-128,392.98

Finding the Fourth Proportional to 219,017.40, 302,308.65 and 128,392.98

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Solution

The fourth proportional to 219,017.40, 302,308.65 and 128,392.98 is: 177,220.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,017.40 : 302,308.65 = 128,392.98 : x
  2. Step 2: Convert to fraction form
    219,017.40/302,308.65 = 128,392.98/x
  3. Step 3: Cross multiply
    219,017.40x = 302,308.65 × 128,392.98
  4. Step 4: Simplify right side
    219,017.40x = 38,814,308,453.28
  5. Step 5: Solve for x
    x = 38,814,308,453.28/219,017.40
  6. Step 6: Final answer
    x = 177,220.20

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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.