Home / 153,780.07-212,303.69-100,038.19

Finding the Fourth Proportional to 153,780.07, 212,303.69 and 100,038.19

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Solution

The fourth proportional to 153,780.07, 212,303.69 and 100,038.19 is: 138,109.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,780.07 : 212,303.69 = 100,038.19 : x
  2. Step 2: Convert to fraction form
    153,780.07/212,303.69 = 100,038.19/x
  3. Step 3: Cross multiply
    153,780.07x = 212,303.69 × 100,038.19
  4. Step 4: Simplify right side
    153,780.07x = 21,238,476,877.92
  5. Step 5: Solve for x
    x = 21,238,476,877.92/153,780.07
  6. Step 6: Final answer
    x = 138,109.42

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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.