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Finding the Fourth Proportional to 128,547.80, 192,692.10 and 58,477.40

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Solution

The fourth proportional to 128,547.80, 192,692.10 and 58,477.40 is: 87,657.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547.80 : 192,692.10 = 58,477.40 : x
  2. Step 2: Convert to fraction form
    128,547.80/192,692.10 = 58,477.40/x
  3. Step 3: Cross multiply
    128,547.80x = 192,692.10 × 58,477.40
  4. Step 4: Simplify right side
    128,547.80x = 11,268,133,008.54
  5. Step 5: Solve for x
    x = 11,268,133,008.54/128,547.80
  6. Step 6: Final answer
    x = 87,657.14

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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.