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Finding the Fourth Proportional to 85,870.61, 118,477.20 and 55,657.20

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Solution

The fourth proportional to 85,870.61, 118,477.20 and 55,657.20 is: 76,791.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,870.61 : 118,477.20 = 55,657.20 : x
  2. Step 2: Convert to fraction form
    85,870.61/118,477.20 = 55,657.20/x
  3. Step 3: Cross multiply
    85,870.61x = 118,477.20 × 55,657.20
  4. Step 4: Simplify right side
    85,870.61x = 6,594,109,215.84
  5. Step 5: Solve for x
    x = 6,594,109,215.84/85,870.61
  6. Step 6: Final answer
    x = 76,791.22

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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.