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Finding the Fourth Proportional to 84,878.79, 117,088.80 and 57,656.28

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Solution

The fourth proportional to 84,878.79, 117,088.80 and 57,656.28 is: 79,535.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,878.79 : 117,088.80 = 57,656.28 : x
  2. Step 2: Convert to fraction form
    84,878.79/117,088.80 = 57,656.28/x
  3. Step 3: Cross multiply
    84,878.79x = 117,088.80 × 57,656.28
  4. Step 4: Simplify right side
    84,878.79x = 6,750,904,637.66
  5. Step 5: Solve for x
    x = 6,750,904,637.66/84,878.79
  6. Step 6: Final answer
    x = 79,535.83

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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.