Home / 90,025.40-135,038.10-56,637.20

Finding the Fourth Proportional to 90,025.40, 135,038.10 and 56,637.20

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Solution

The fourth proportional to 90,025.40, 135,038.10 and 56,637.20 is: 84,955.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,025.40 : 135,038.10 = 56,637.20 : x
  2. Step 2: Convert to fraction form
    90,025.40/135,038.10 = 56,637.20/x
  3. Step 3: Cross multiply
    90,025.40x = 135,038.10 × 56,637.20
  4. Step 4: Simplify right side
    90,025.40x = 7,648,179,877.32
  5. Step 5: Solve for x
    x = 7,648,179,877.32/90,025.40
  6. Step 6: Final answer
    x = 84,955.80

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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.