Home / 78,357.21-108,133.35-42,547.20

Finding the Fourth Proportional to 78,357.21, 108,133.35 and 42,547.20

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Solution

The fourth proportional to 78,357.21, 108,133.35 and 42,547.20 is: 58,715.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,357.21 : 108,133.35 = 42,547.20 : x
  2. Step 2: Convert to fraction form
    78,357.21/108,133.35 = 42,547.20/x
  3. Step 3: Cross multiply
    78,357.21x = 108,133.35 × 42,547.20
  4. Step 4: Simplify right side
    78,357.21x = 4,600,771,269.12
  5. Step 5: Solve for x
    x = 4,600,771,269.12/78,357.21
  6. Step 6: Final answer
    x = 58,715.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.