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Finding the Fourth Proportional to 46,978.03, 70,478.55 and 15,389.79

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Solution

The fourth proportional to 46,978.03, 70,478.55 and 15,389.79 is: 23,088.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,978.03 : 70,478.55 = 15,389.79 : x
  2. Step 2: Convert to fraction form
    46,978.03/70,478.55 = 15,389.79/x
  3. Step 3: Cross multiply
    46,978.03x = 70,478.55 × 15,389.79
  4. Step 4: Simplify right side
    46,978.03x = 1,084,650,084.00
  5. Step 5: Solve for x
    x = 1,084,650,084.00/46,978.03
  6. Step 6: Final answer
    x = 23,088.45

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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.