Home / 85,626,692.95-128,438,923.65-20,931,066.31

Finding the Fourth Proportional to 85,626,692.95, 128,438,923.65 and 20,931,066.31

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Solution

The fourth proportional to 85,626,692.95, 128,438,923.65 and 20,931,066.31 is: 31,396,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,626,692.95 : 128,438,923.65 = 20,931,066.31 : x
  2. Step 2: Convert to fraction form
    85,626,692.95/128,438,923.65 = 20,931,066.31/x
  3. Step 3: Cross multiply
    85,626,692.95x = 128,438,923.65 × 20,931,066.31
  4. Step 4: Simplify right side
    85,626,692.95x = 2,688,363,627,703,177
  5. Step 5: Solve for x
    x = 2,688,363,627,703,177/85,626,692.95
  6. Step 6: Final answer
    x = 31,396,326.72

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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.