Home / 78,547.32-108,397.58-42,739.65

Finding the Fourth Proportional to 78,547.32, 108,397.58 and 42,739.65

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Solution

The fourth proportional to 78,547.32, 108,397.58 and 42,739.65 is: 58,981.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,547.32 : 108,397.58 = 42,739.65 : x
  2. Step 2: Convert to fraction form
    78,547.32/108,397.58 = 42,739.65/x
  3. Step 3: Cross multiply
    78,547.32x = 108,397.58 × 42,739.65
  4. Step 4: Simplify right side
    78,547.32x = 4,632,874,416.35
  5. Step 5: Solve for x
    x = 4,632,874,416.35/78,547.32
  6. Step 6: Final answer
    x = 58,981.95

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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.