Home / 90,030.16-135,038.76-39,434.32

Finding the Fourth Proportional to 90,030.16, 135,038.76 and 39,434.32

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Solution

The fourth proportional to 90,030.16, 135,038.76 and 39,434.32 is: 59,148.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,030.16 : 135,038.76 = 39,434.32 : x
  2. Step 2: Convert to fraction form
    90,030.16/135,038.76 = 39,434.32/x
  3. Step 3: Cross multiply
    90,030.16x = 135,038.76 × 39,434.32
  4. Step 4: Simplify right side
    90,030.16x = 5,325,161,674.24
  5. Step 5: Solve for x
    x = 5,325,161,674.24/90,030.16
  6. Step 6: Final answer
    x = 59,148.64

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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.