Home / 85,870.51-128,639.70-48,316.48

Finding the Fourth Proportional to 85,870.51, 128,639.70 and 48,316.48

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Solution

The fourth proportional to 85,870.51, 128,639.70 and 48,316.48 is: 72,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,870.51 : 128,639.70 = 48,316.48 : x
  2. Step 2: Convert to fraction form
    85,870.51/128,639.70 = 48,316.48/x
  3. Step 3: Cross multiply
    85,870.51x = 128,639.70 × 48,316.48
  4. Step 4: Simplify right side
    85,870.51x = 6,215,417,492.26
  5. Step 5: Solve for x
    x = 6,215,417,492.26/85,870.51
  6. Step 6: Final answer
    x = 72,381.28

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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.