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Finding the Fourth Proportional to 125,071.56, 172,574.74 and 84,818.12

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Solution

The fourth proportional to 125,071.56, 172,574.74 and 84,818.12 is: 117,032.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,071.56 : 172,574.74 = 84,818.12 : x
  2. Step 2: Convert to fraction form
    125,071.56/172,574.74 = 84,818.12/x
  3. Step 3: Cross multiply
    125,071.56x = 172,574.74 × 84,818.12
  4. Step 4: Simplify right side
    125,071.56x = 14,637,465,006.29
  5. Step 5: Solve for x
    x = 14,637,465,006.29/125,071.56
  6. Step 6: Final answer
    x = 117,032.72

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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.