Home / 78,518.16-108,356.13-42,709.68

Finding the Fourth Proportional to 78,518.16, 108,356.13 and 42,709.68

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Solution

The fourth proportional to 78,518.16, 108,356.13 and 42,709.68 is: 58,939.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,518.16 : 108,356.13 = 42,709.68 : x
  2. Step 2: Convert to fraction form
    78,518.16/108,356.13 = 42,709.68/x
  3. Step 3: Cross multiply
    78,518.16x = 108,356.13 × 42,709.68
  4. Step 4: Simplify right side
    78,518.16x = 4,627,855,638.34
  5. Step 5: Solve for x
    x = 4,627,855,638.34/78,518.16
  6. Step 6: Final answer
    x = 58,939.94

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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.