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Finding the Fourth Proportional to 86,692.40, 130,038.60 and 55,588.40

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Solution

The fourth proportional to 86,692.40, 130,038.60 and 55,588.40 is: 83,382.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,692.40 : 130,038.60 = 55,588.40 : x
  2. Step 2: Convert to fraction form
    86,692.40/130,038.60 = 55,588.40/x
  3. Step 3: Cross multiply
    86,692.40x = 130,038.60 × 55,588.40
  4. Step 4: Simplify right side
    86,692.40x = 7,228,637,712.24
  5. Step 5: Solve for x
    x = 7,228,637,712.24/86,692.40
  6. Step 6: Final answer
    x = 83,382.60

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1.5x scale

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.