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Finding the Fourth Proportional to 86,726.80, 130,025.40 and 47,328.40

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Solution

The fourth proportional to 86,726.80, 130,025.40 and 47,328.40 is: 70,957.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,726.80 : 130,025.40 = 47,328.40 : x
  2. Step 2: Convert to fraction form
    86,726.80/130,025.40 = 47,328.40/x
  3. Step 3: Cross multiply
    86,726.80x = 130,025.40 × 47,328.40
  4. Step 4: Simplify right side
    86,726.80x = 6,153,894,141.36
  5. Step 5: Solve for x
    x = 6,153,894,141.36/86,726.80
  6. Step 6: Final answer
    x = 70,957.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.