Home / 152,430.75-210,015.69-100,655.90

Finding the Fourth Proportional to 152,430.75, 210,015.69 and 100,655.90

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Solution

The fourth proportional to 152,430.75, 210,015.69 and 100,655.90 is: 138,681.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,430.75 : 210,015.69 = 100,655.90 : x
  2. Step 2: Convert to fraction form
    152,430.75/210,015.69 = 100,655.90/x
  3. Step 3: Cross multiply
    152,430.75x = 210,015.69 × 100,655.90
  4. Step 4: Simplify right side
    152,430.75x = 21,139,317,240.99
  5. Step 5: Solve for x
    x = 21,139,317,240.99/152,430.75
  6. Step 6: Final answer
    x = 138,681.45

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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.