Home / 78,030.15-107,681.40-42,220.14

Finding the Fourth Proportional to 78,030.15, 107,681.40 and 42,220.14

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Solution

The fourth proportional to 78,030.15, 107,681.40 and 42,220.14 is: 58,263.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,030.15 : 107,681.40 = 42,220.14 : x
  2. Step 2: Convert to fraction form
    78,030.15/107,681.40 = 42,220.14/x
  3. Step 3: Cross multiply
    78,030.15x = 107,681.40 × 42,220.14
  4. Step 4: Simplify right side
    78,030.15x = 4,546,323,783.40
  5. Step 5: Solve for x
    x = 4,546,323,783.40/78,030.15
  6. Step 6: Final answer
    x = 58,263.68

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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.