Home / 76,386.80-105,412.20-42,393.32

Finding the Fourth Proportional to 76,386.80, 105,412.20 and 42,393.32

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Solution

The fourth proportional to 76,386.80, 105,412.20 and 42,393.32 is: 58,501.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,386.80 : 105,412.20 = 42,393.32 : x
  2. Step 2: Convert to fraction form
    76,386.80/105,412.20 = 42,393.32/x
  3. Step 3: Cross multiply
    76,386.80x = 105,412.20 × 42,393.32
  4. Step 4: Simplify right side
    76,386.80x = 4,468,772,599.44
  5. Step 5: Solve for x
    x = 4,468,772,599.44/76,386.80
  6. Step 6: Final answer
    x = 58,501.89

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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.