Home / 85,427.30-128,140.95-61,807.70

Finding the Fourth Proportional to 85,427.30, 128,140.95 and 61,807.70

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Solution

The fourth proportional to 85,427.30, 128,140.95 and 61,807.70 is: 92,711.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,427.30 : 128,140.95 = 61,807.70 : x
  2. Step 2: Convert to fraction form
    85,427.30/128,140.95 = 61,807.70/x
  3. Step 3: Cross multiply
    85,427.30x = 128,140.95 × 61,807.70
  4. Step 4: Simplify right side
    85,427.30x = 7,920,097,395.32
  5. Step 5: Solve for x
    x = 7,920,097,395.32/85,427.30
  6. Step 6: Final answer
    x = 92,711.55

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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.