Home / 155,953.34-215,210.75-87,969.30

Finding the Fourth Proportional to 155,953.34, 215,210.75 and 87,969.30

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Solution

The fourth proportional to 155,953.34, 215,210.75 and 87,969.30 is: 121,394.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,953.34 : 215,210.75 = 87,969.30 : x
  2. Step 2: Convert to fraction form
    155,953.34/215,210.75 = 87,969.30/x
  3. Step 3: Cross multiply
    155,953.34x = 215,210.75 × 87,969.30
  4. Step 4: Simplify right side
    155,953.34x = 18,931,939,029.98
  5. Step 5: Solve for x
    x = 18,931,939,029.98/155,953.34
  6. Step 6: Final answer
    x = 121,394.89

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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.